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1/*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
26 */
27
28
29#include <linux/sync_file.h>
30
31#include <drm/drm_atomic.h>
32#include <drm/drm_atomic_uapi.h>
33#include <drm/drm_bridge.h>
34#include <drm/drm_debugfs.h>
35#include <drm/drm_device.h>
36#include <drm/drm_drv.h>
37#include <drm/drm_file.h>
38#include <drm/drm_fourcc.h>
39#include <drm/drm_mode.h>
40#include <drm/drm_print.h>
41#include <drm/drm_writeback.h>
42
43#include "drm_crtc_internal.h"
44#include "drm_internal.h"
45
46void __drm_crtc_commit_free(struct kref *kref)
47{
48 struct drm_crtc_commit *commit =
49 container_of(kref, struct drm_crtc_commit, ref);
50
51 kfree(commit);
52}
53EXPORT_SYMBOL(__drm_crtc_commit_free);
54
55/**
56 * drm_atomic_state_default_release -
57 * release memory initialized by drm_atomic_state_init
58 * @state: atomic state
59 *
60 * Free all the memory allocated by drm_atomic_state_init.
61 * This should only be used by drivers which are still subclassing
62 * &drm_atomic_state and haven't switched to &drm_private_state yet.
63 */
64void drm_atomic_state_default_release(struct drm_atomic_state *state)
65{
66 kfree(state->connectors);
67 kfree(state->crtcs);
68 kfree(state->planes);
69 kfree(state->private_objs);
70}
71EXPORT_SYMBOL(drm_atomic_state_default_release);
72
73/**
74 * drm_atomic_state_init - init new atomic state
75 * @dev: DRM device
76 * @state: atomic state
77 *
78 * Default implementation for filling in a new atomic state.
79 * This should only be used by drivers which are still subclassing
80 * &drm_atomic_state and haven't switched to &drm_private_state yet.
81 */
82int
83drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
84{
85 kref_init(&state->ref);
86
87 /* TODO legacy paths should maybe do a better job about
88 * setting this appropriately?
89 */
90 state->allow_modeset = true;
91
92 state->crtcs = kcalloc(dev->mode_config.num_crtc,
93 sizeof(*state->crtcs), GFP_KERNEL);
94 if (!state->crtcs)
95 goto fail;
96 state->planes = kcalloc(dev->mode_config.num_total_plane,
97 sizeof(*state->planes), GFP_KERNEL);
98 if (!state->planes)
99 goto fail;
100
101 state->dev = dev;
102
103 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state);
104
105 return 0;
106fail:
107 drm_atomic_state_default_release(state);
108 return -ENOMEM;
109}
110EXPORT_SYMBOL(drm_atomic_state_init);
111
112/**
113 * drm_atomic_state_alloc - allocate atomic state
114 * @dev: DRM device
115 *
116 * This allocates an empty atomic state to track updates.
117 */
118struct drm_atomic_state *
119drm_atomic_state_alloc(struct drm_device *dev)
120{
121 struct drm_mode_config *config = &dev->mode_config;
122
123 if (!config->funcs->atomic_state_alloc) {
124 struct drm_atomic_state *state;
125
126 state = kzalloc(sizeof(*state), GFP_KERNEL);
127 if (!state)
128 return NULL;
129 if (drm_atomic_state_init(dev, state) < 0) {
130 kfree(state);
131 return NULL;
132 }
133 return state;
134 }
135
136 return config->funcs->atomic_state_alloc(dev);
137}
138EXPORT_SYMBOL(drm_atomic_state_alloc);
139
140/**
141 * drm_atomic_state_default_clear - clear base atomic state
142 * @state: atomic state
143 *
144 * Default implementation for clearing atomic state.
145 * This should only be used by drivers which are still subclassing
146 * &drm_atomic_state and haven't switched to &drm_private_state yet.
147 */
148void drm_atomic_state_default_clear(struct drm_atomic_state *state)
149{
150 struct drm_device *dev = state->dev;
151 struct drm_mode_config *config = &dev->mode_config;
152 int i;
153
154 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state);
155
156 for (i = 0; i < state->num_connector; i++) {
157 struct drm_connector *connector = state->connectors[i].ptr;
158
159 if (!connector)
160 continue;
161
162 connector->funcs->atomic_destroy_state(connector,
163 state->connectors[i].state);
164 state->connectors[i].ptr = NULL;
165 state->connectors[i].state = NULL;
166 state->connectors[i].old_state = NULL;
167 state->connectors[i].new_state = NULL;
168 drm_connector_put(connector);
169 }
170
171 for (i = 0; i < config->num_crtc; i++) {
172 struct drm_crtc *crtc = state->crtcs[i].ptr;
173
174 if (!crtc)
175 continue;
176
177 crtc->funcs->atomic_destroy_state(crtc,
178 state->crtcs[i].state);
179
180 state->crtcs[i].ptr = NULL;
181 state->crtcs[i].state = NULL;
182 state->crtcs[i].old_state = NULL;
183 state->crtcs[i].new_state = NULL;
184
185 if (state->crtcs[i].commit) {
186 drm_crtc_commit_put(state->crtcs[i].commit);
187 state->crtcs[i].commit = NULL;
188 }
189 }
190
191 for (i = 0; i < config->num_total_plane; i++) {
192 struct drm_plane *plane = state->planes[i].ptr;
193
194 if (!plane)
195 continue;
196
197 plane->funcs->atomic_destroy_state(plane,
198 state->planes[i].state);
199 state->planes[i].ptr = NULL;
200 state->planes[i].state = NULL;
201 state->planes[i].old_state = NULL;
202 state->planes[i].new_state = NULL;
203 }
204
205 for (i = 0; i < state->num_private_objs; i++) {
206 struct drm_private_obj *obj = state->private_objs[i].ptr;
207
208 obj->funcs->atomic_destroy_state(obj,
209 state->private_objs[i].state);
210 state->private_objs[i].ptr = NULL;
211 state->private_objs[i].state = NULL;
212 state->private_objs[i].old_state = NULL;
213 state->private_objs[i].new_state = NULL;
214 }
215 state->num_private_objs = 0;
216
217 if (state->fake_commit) {
218 drm_crtc_commit_put(state->fake_commit);
219 state->fake_commit = NULL;
220 }
221}
222EXPORT_SYMBOL(drm_atomic_state_default_clear);
223
224/**
225 * drm_atomic_state_clear - clear state object
226 * @state: atomic state
227 *
228 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
229 * all locks. So someone else could sneak in and change the current modeset
230 * configuration. Which means that all the state assembled in @state is no
231 * longer an atomic update to the current state, but to some arbitrary earlier
232 * state. Which could break assumptions the driver's
233 * &drm_mode_config_funcs.atomic_check likely relies on.
234 *
235 * Hence we must clear all cached state and completely start over, using this
236 * function.
237 */
238void drm_atomic_state_clear(struct drm_atomic_state *state)
239{
240 struct drm_device *dev = state->dev;
241 struct drm_mode_config *config = &dev->mode_config;
242
243 if (config->funcs->atomic_state_clear)
244 config->funcs->atomic_state_clear(state);
245 else
246 drm_atomic_state_default_clear(state);
247}
248EXPORT_SYMBOL(drm_atomic_state_clear);
249
250/**
251 * __drm_atomic_state_free - free all memory for an atomic state
252 * @ref: This atomic state to deallocate
253 *
254 * This frees all memory associated with an atomic state, including all the
255 * per-object state for planes, CRTCs and connectors.
256 */
257void __drm_atomic_state_free(struct kref *ref)
258{
259 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
260 struct drm_mode_config *config = &state->dev->mode_config;
261
262 drm_atomic_state_clear(state);
263
264 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
265
266 if (config->funcs->atomic_state_free) {
267 config->funcs->atomic_state_free(state);
268 } else {
269 drm_atomic_state_default_release(state);
270 kfree(state);
271 }
272}
273EXPORT_SYMBOL(__drm_atomic_state_free);
274
275/**
276 * drm_atomic_get_crtc_state - get CRTC state
277 * @state: global atomic state object
278 * @crtc: CRTC to get state object for
279 *
280 * This function returns the CRTC state for the given CRTC, allocating it if
281 * needed. It will also grab the relevant CRTC lock to make sure that the state
282 * is consistent.
283 *
284 * Returns:
285 *
286 * Either the allocated state or the error code encoded into the pointer. When
287 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
288 * entire atomic sequence must be restarted. All other errors are fatal.
289 */
290struct drm_crtc_state *
291drm_atomic_get_crtc_state(struct drm_atomic_state *state,
292 struct drm_crtc *crtc)
293{
294 int ret, index = drm_crtc_index(crtc);
295 struct drm_crtc_state *crtc_state;
296
297 WARN_ON(!state->acquire_ctx);
298
299 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
300 if (crtc_state)
301 return crtc_state;
302
303 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
304 if (ret)
305 return ERR_PTR(ret);
306
307 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
308 if (!crtc_state)
309 return ERR_PTR(-ENOMEM);
310
311 state->crtcs[index].state = crtc_state;
312 state->crtcs[index].old_state = crtc->state;
313 state->crtcs[index].new_state = crtc_state;
314 state->crtcs[index].ptr = crtc;
315 crtc_state->state = state;
316
317 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
318 crtc->base.id, crtc->name, crtc_state, state);
319
320 return crtc_state;
321}
322EXPORT_SYMBOL(drm_atomic_get_crtc_state);
323
324static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state,
325 const struct drm_crtc_state *new_crtc_state)
326{
327 struct drm_crtc *crtc = new_crtc_state->crtc;
328
329 /* NOTE: we explicitly don't enforce constraints such as primary
330 * layer covering entire screen, since that is something we want
331 * to allow (on hw that supports it). For hw that does not, it
332 * should be checked in driver's crtc->atomic_check() vfunc.
333 *
334 * TODO: Add generic modeset state checks once we support those.
335 */
336
337 if (new_crtc_state->active && !new_crtc_state->enable) {
338 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
339 crtc->base.id, crtc->name);
340 return -EINVAL;
341 }
342
343 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
344 * as this is a kernel-internal detail that userspace should never
345 * be able to trigger. */
346 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
347 WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) {
348 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
349 crtc->base.id, crtc->name);
350 return -EINVAL;
351 }
352
353 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
354 WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) {
355 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
356 crtc->base.id, crtc->name);
357 return -EINVAL;
358 }
359
360 /*
361 * Reject event generation for when a CRTC is off and stays off.
362 * It wouldn't be hard to implement this, but userspace has a track
363 * record of happily burning through 100% cpu (or worse, crash) when the
364 * display pipe is suspended. To avoid all that fun just reject updates
365 * that ask for events since likely that indicates a bug in the
366 * compositor's drawing loop. This is consistent with the vblank IOCTL
367 * and legacy page_flip IOCTL which also reject service on a disabled
368 * pipe.
369 */
370 if (new_crtc_state->event &&
371 !new_crtc_state->active && !old_crtc_state->active) {
372 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n",
373 crtc->base.id, crtc->name);
374 return -EINVAL;
375 }
376
377 return 0;
378}
379
380static void drm_atomic_crtc_print_state(struct drm_printer *p,
381 const struct drm_crtc_state *state)
382{
383 struct drm_crtc *crtc = state->crtc;
384
385 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
386 drm_printf(p, "\tenable=%d\n", state->enable);
387 drm_printf(p, "\tactive=%d\n", state->active);
388 drm_printf(p, "\tself_refresh_active=%d\n", state->self_refresh_active);
389 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
390 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
391 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
392 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
393 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
394 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
395 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
396 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
397 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
398
399 if (crtc->funcs->atomic_print_state)
400 crtc->funcs->atomic_print_state(p, state);
401}
402
403static int drm_atomic_connector_check(struct drm_connector *connector,
404 struct drm_connector_state *state)
405{
406 struct drm_crtc_state *crtc_state;
407 struct drm_writeback_job *writeback_job = state->writeback_job;
408 const struct drm_display_info *info = &connector->display_info;
409
410 state->max_bpc = info->bpc ? info->bpc : 8;
411 if (connector->max_bpc_property)
412 state->max_bpc = min(state->max_bpc, state->max_requested_bpc);
413
414 if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)
415 return 0;
416
417 if (writeback_job->fb && !state->crtc) {
418 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] framebuffer without CRTC\n",
419 connector->base.id, connector->name);
420 return -EINVAL;
421 }
422
423 if (state->crtc)
424 crtc_state = drm_atomic_get_existing_crtc_state(state->state,
425 state->crtc);
426
427 if (writeback_job->fb && !crtc_state->active) {
428 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",
429 connector->base.id, connector->name,
430 state->crtc->base.id);
431 return -EINVAL;
432 }
433
434 if (!writeback_job->fb) {
435 if (writeback_job->out_fence) {
436 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
437 connector->base.id, connector->name);
438 return -EINVAL;
439 }
440
441 drm_writeback_cleanup_job(writeback_job);
442 state->writeback_job = NULL;
443 }
444
445 return 0;
446}
447
448/**
449 * drm_atomic_get_plane_state - get plane state
450 * @state: global atomic state object
451 * @plane: plane to get state object for
452 *
453 * This function returns the plane state for the given plane, allocating it if
454 * needed. It will also grab the relevant plane lock to make sure that the state
455 * is consistent.
456 *
457 * Returns:
458 *
459 * Either the allocated state or the error code encoded into the pointer. When
460 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
461 * entire atomic sequence must be restarted. All other errors are fatal.
462 */
463struct drm_plane_state *
464drm_atomic_get_plane_state(struct drm_atomic_state *state,
465 struct drm_plane *plane)
466{
467 int ret, index = drm_plane_index(plane);
468 struct drm_plane_state *plane_state;
469
470 WARN_ON(!state->acquire_ctx);
471
472 /* the legacy pointers should never be set */
473 WARN_ON(plane->fb);
474 WARN_ON(plane->old_fb);
475 WARN_ON(plane->crtc);
476
477 plane_state = drm_atomic_get_existing_plane_state(state, plane);
478 if (plane_state)
479 return plane_state;
480
481 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
482 if (ret)
483 return ERR_PTR(ret);
484
485 plane_state = plane->funcs->atomic_duplicate_state(plane);
486 if (!plane_state)
487 return ERR_PTR(-ENOMEM);
488
489 state->planes[index].state = plane_state;
490 state->planes[index].ptr = plane;
491 state->planes[index].old_state = plane->state;
492 state->planes[index].new_state = plane_state;
493 plane_state->state = state;
494
495 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
496 plane->base.id, plane->name, plane_state, state);
497
498 if (plane_state->crtc) {
499 struct drm_crtc_state *crtc_state;
500
501 crtc_state = drm_atomic_get_crtc_state(state,
502 plane_state->crtc);
503 if (IS_ERR(crtc_state))
504 return ERR_CAST(crtc_state);
505 }
506
507 return plane_state;
508}
509EXPORT_SYMBOL(drm_atomic_get_plane_state);
510
511static bool
512plane_switching_crtc(const struct drm_plane_state *old_plane_state,
513 const struct drm_plane_state *new_plane_state)
514{
515 if (!old_plane_state->crtc || !new_plane_state->crtc)
516 return false;
517
518 if (old_plane_state->crtc == new_plane_state->crtc)
519 return false;
520
521 /* This could be refined, but currently there's no helper or driver code
522 * to implement direct switching of active planes nor userspace to take
523 * advantage of more direct plane switching without the intermediate
524 * full OFF state.
525 */
526 return true;
527}
528
529/**
530 * drm_atomic_plane_check - check plane state
531 * @old_plane_state: old plane state to check
532 * @new_plane_state: new plane state to check
533 *
534 * Provides core sanity checks for plane state.
535 *
536 * RETURNS:
537 * Zero on success, error code on failure
538 */
539static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
540 const struct drm_plane_state *new_plane_state)
541{
542 struct drm_plane *plane = new_plane_state->plane;
543 struct drm_crtc *crtc = new_plane_state->crtc;
544 const struct drm_framebuffer *fb = new_plane_state->fb;
545 unsigned int fb_width, fb_height;
546 struct drm_mode_rect *clips;
547 uint32_t num_clips;
548 int ret;
549
550 /* either *both* CRTC and FB must be set, or neither */
551 if (crtc && !fb) {
552 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] CRTC set but no FB\n",
553 plane->base.id, plane->name);
554 return -EINVAL;
555 } else if (fb && !crtc) {
556 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] FB set but no CRTC\n",
557 plane->base.id, plane->name);
558 return -EINVAL;
559 }
560
561 /* if disabled, we don't care about the rest of the state: */
562 if (!crtc)
563 return 0;
564
565 /* Check whether this plane is usable on this CRTC */
566 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
567 DRM_DEBUG_ATOMIC("Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
568 crtc->base.id, crtc->name,
569 plane->base.id, plane->name);
570 return -EINVAL;
571 }
572
573 /* Check whether this plane supports the fb pixel format. */
574 ret = drm_plane_check_pixel_format(plane, fb->format->format,
575 fb->modifier);
576 if (ret) {
577 struct drm_format_name_buf format_name;
578
579 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid pixel format %s, modifier 0x%llx\n",
580 plane->base.id, plane->name,
581 drm_get_format_name(fb->format->format,
582 &format_name),
583 fb->modifier);
584 return ret;
585 }
586
587 /* Give drivers some help against integer overflows */
588 if (new_plane_state->crtc_w > INT_MAX ||
589 new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w ||
590 new_plane_state->crtc_h > INT_MAX ||
591 new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) {
592 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
593 plane->base.id, plane->name,
594 new_plane_state->crtc_w, new_plane_state->crtc_h,
595 new_plane_state->crtc_x, new_plane_state->crtc_y);
596 return -ERANGE;
597 }
598
599 fb_width = fb->width << 16;
600 fb_height = fb->height << 16;
601
602 /* Make sure source coordinates are inside the fb. */
603 if (new_plane_state->src_w > fb_width ||
604 new_plane_state->src_x > fb_width - new_plane_state->src_w ||
605 new_plane_state->src_h > fb_height ||
606 new_plane_state->src_y > fb_height - new_plane_state->src_h) {
607 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid source coordinates "
608 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
609 plane->base.id, plane->name,
610 new_plane_state->src_w >> 16,
611 ((new_plane_state->src_w & 0xffff) * 15625) >> 10,
612 new_plane_state->src_h >> 16,
613 ((new_plane_state->src_h & 0xffff) * 15625) >> 10,
614 new_plane_state->src_x >> 16,
615 ((new_plane_state->src_x & 0xffff) * 15625) >> 10,
616 new_plane_state->src_y >> 16,
617 ((new_plane_state->src_y & 0xffff) * 15625) >> 10,
618 fb->width, fb->height);
619 return -ENOSPC;
620 }
621
622 clips = drm_plane_get_damage_clips(new_plane_state);
623 num_clips = drm_plane_get_damage_clips_count(new_plane_state);
624
625 /* Make sure damage clips are valid and inside the fb. */
626 while (num_clips > 0) {
627 if (clips->x1 >= clips->x2 ||
628 clips->y1 >= clips->y2 ||
629 clips->x1 < 0 ||
630 clips->y1 < 0 ||
631 clips->x2 > fb_width ||
632 clips->y2 > fb_height) {
633 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid damage clip %d %d %d %d\n",
634 plane->base.id, plane->name, clips->x1,
635 clips->y1, clips->x2, clips->y2);
636 return -EINVAL;
637 }
638 clips++;
639 num_clips--;
640 }
641
642 if (plane_switching_crtc(old_plane_state, new_plane_state)) {
643 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
644 plane->base.id, plane->name);
645 return -EINVAL;
646 }
647
648 return 0;
649}
650
651static void drm_atomic_plane_print_state(struct drm_printer *p,
652 const struct drm_plane_state *state)
653{
654 struct drm_plane *plane = state->plane;
655 struct drm_rect src = drm_plane_state_src(state);
656 struct drm_rect dest = drm_plane_state_dest(state);
657
658 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
659 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
660 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
661 if (state->fb)
662 drm_framebuffer_print_info(p, 2, state->fb);
663 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
664 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
665 drm_printf(p, "\trotation=%x\n", state->rotation);
666 drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos);
667 drm_printf(p, "\tcolor-encoding=%s\n",
668 drm_get_color_encoding_name(state->color_encoding));
669 drm_printf(p, "\tcolor-range=%s\n",
670 drm_get_color_range_name(state->color_range));
671
672 if (plane->funcs->atomic_print_state)
673 plane->funcs->atomic_print_state(p, state);
674}
675
676/**
677 * DOC: handling driver private state
678 *
679 * Very often the DRM objects exposed to userspace in the atomic modeset api
680 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
681 * underlying hardware. Especially for any kind of shared resources (e.g. shared
682 * clocks, scaler units, bandwidth and fifo limits shared among a group of
683 * planes or CRTCs, and so on) it makes sense to model these as independent
684 * objects. Drivers then need to do similar state tracking and commit ordering for
685 * such private (since not exposed to userpace) objects as the atomic core and
686 * helpers already provide for connectors, planes and CRTCs.
687 *
688 * To make this easier on drivers the atomic core provides some support to track
689 * driver private state objects using struct &drm_private_obj, with the
690 * associated state struct &drm_private_state.
691 *
692 * Similar to userspace-exposed objects, private state structures can be
693 * acquired by calling drm_atomic_get_private_obj_state(). This also takes care
694 * of locking, hence drivers should not have a need to call drm_modeset_lock()
695 * directly. Sequence of the actual hardware state commit is not handled,
696 * drivers might need to keep track of struct drm_crtc_commit within subclassed
697 * structure of &drm_private_state as necessary, e.g. similar to
698 * &drm_plane_state.commit. See also &drm_atomic_state.fake_commit.
699 *
700 * All private state structures contained in a &drm_atomic_state update can be
701 * iterated using for_each_oldnew_private_obj_in_state(),
702 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
703 * Drivers are recommended to wrap these for each type of driver private state
704 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
705 * least if they want to iterate over all objects of a given type.
706 *
707 * An earlier way to handle driver private state was by subclassing struct
708 * &drm_atomic_state. But since that encourages non-standard ways to implement
709 * the check/commit split atomic requires (by using e.g. "check and rollback or
710 * commit instead" of "duplicate state, check, then either commit or release
711 * duplicated state) it is deprecated in favour of using &drm_private_state.
712 */
713
714/**
715 * drm_atomic_private_obj_init - initialize private object
716 * @dev: DRM device this object will be attached to
717 * @obj: private object
718 * @state: initial private object state
719 * @funcs: pointer to the struct of function pointers that identify the object
720 * type
721 *
722 * Initialize the private object, which can be embedded into any
723 * driver private object that needs its own atomic state.
724 */
725void
726drm_atomic_private_obj_init(struct drm_device *dev,
727 struct drm_private_obj *obj,
728 struct drm_private_state *state,
729 const struct drm_private_state_funcs *funcs)
730{
731 memset(obj, 0, sizeof(*obj));
732
733 drm_modeset_lock_init(&obj->lock);
734
735 obj->state = state;
736 obj->funcs = funcs;
737 list_add_tail(&obj->head, &dev->mode_config.privobj_list);
738}
739EXPORT_SYMBOL(drm_atomic_private_obj_init);
740
741/**
742 * drm_atomic_private_obj_fini - finalize private object
743 * @obj: private object
744 *
745 * Finalize the private object.
746 */
747void
748drm_atomic_private_obj_fini(struct drm_private_obj *obj)
749{
750 list_del(&obj->head);
751 obj->funcs->atomic_destroy_state(obj, obj->state);
752 drm_modeset_lock_fini(&obj->lock);
753}
754EXPORT_SYMBOL(drm_atomic_private_obj_fini);
755
756/**
757 * drm_atomic_get_private_obj_state - get private object state
758 * @state: global atomic state
759 * @obj: private object to get the state for
760 *
761 * This function returns the private object state for the given private object,
762 * allocating the state if needed. It will also grab the relevant private
763 * object lock to make sure that the state is consistent.
764 *
765 * RETURNS:
766 *
767 * Either the allocated state or the error code encoded into a pointer.
768 */
769struct drm_private_state *
770drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
771 struct drm_private_obj *obj)
772{
773 int index, num_objs, i, ret;
774 size_t size;
775 struct __drm_private_objs_state *arr;
776 struct drm_private_state *obj_state;
777
778 for (i = 0; i < state->num_private_objs; i++)
779 if (obj == state->private_objs[i].ptr)
780 return state->private_objs[i].state;
781
782 ret = drm_modeset_lock(&obj->lock, state->acquire_ctx);
783 if (ret)
784 return ERR_PTR(ret);
785
786 num_objs = state->num_private_objs + 1;
787 size = sizeof(*state->private_objs) * num_objs;
788 arr = krealloc(state->private_objs, size, GFP_KERNEL);
789 if (!arr)
790 return ERR_PTR(-ENOMEM);
791
792 state->private_objs = arr;
793 index = state->num_private_objs;
794 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
795
796 obj_state = obj->funcs->atomic_duplicate_state(obj);
797 if (!obj_state)
798 return ERR_PTR(-ENOMEM);
799
800 state->private_objs[index].state = obj_state;
801 state->private_objs[index].old_state = obj->state;
802 state->private_objs[index].new_state = obj_state;
803 state->private_objs[index].ptr = obj;
804 obj_state->state = state;
805
806 state->num_private_objs = num_objs;
807
808 DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n",
809 obj, obj_state, state);
810
811 return obj_state;
812}
813EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
814
815/**
816 * drm_atomic_get_old_private_obj_state
817 * @state: global atomic state object
818 * @obj: private_obj to grab
819 *
820 * This function returns the old private object state for the given private_obj,
821 * or NULL if the private_obj is not part of the global atomic state.
822 */
823struct drm_private_state *
824drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
825 struct drm_private_obj *obj)
826{
827 int i;
828
829 for (i = 0; i < state->num_private_objs; i++)
830 if (obj == state->private_objs[i].ptr)
831 return state->private_objs[i].old_state;
832
833 return NULL;
834}
835EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
836
837/**
838 * drm_atomic_get_new_private_obj_state
839 * @state: global atomic state object
840 * @obj: private_obj to grab
841 *
842 * This function returns the new private object state for the given private_obj,
843 * or NULL if the private_obj is not part of the global atomic state.
844 */
845struct drm_private_state *
846drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
847 struct drm_private_obj *obj)
848{
849 int i;
850
851 for (i = 0; i < state->num_private_objs; i++)
852 if (obj == state->private_objs[i].ptr)
853 return state->private_objs[i].new_state;
854
855 return NULL;
856}
857EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
858
859/**
860 * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder
861 * @state: Atomic state
862 * @encoder: The encoder to fetch the connector state for
863 *
864 * This function finds and returns the connector that was connected to @encoder
865 * as specified by the @state.
866 *
867 * If there is no connector in @state which previously had @encoder connected to
868 * it, this function will return NULL. While this may seem like an invalid use
869 * case, it is sometimes useful to differentiate commits which had no prior
870 * connectors attached to @encoder vs ones that did (and to inspect their
871 * state). This is especially true in enable hooks because the pipeline has
872 * changed.
873 *
874 * Returns: The old connector connected to @encoder, or NULL if the encoder is
875 * not connected.
876 */
877struct drm_connector *
878drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state,
879 struct drm_encoder *encoder)
880{
881 struct drm_connector_state *conn_state;
882 struct drm_connector *connector;
883 unsigned int i;
884
885 for_each_old_connector_in_state(state, connector, conn_state, i) {
886 if (conn_state->best_encoder == encoder)
887 return connector;
888 }
889
890 return NULL;
891}
892EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);
893
894/**
895 * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder
896 * @state: Atomic state
897 * @encoder: The encoder to fetch the connector state for
898 *
899 * This function finds and returns the connector that will be connected to
900 * @encoder as specified by the @state.
901 *
902 * If there is no connector in @state which will have @encoder connected to it,
903 * this function will return NULL. While this may seem like an invalid use case,
904 * it is sometimes useful to differentiate commits which have no connectors
905 * attached to @encoder vs ones that do (and to inspect their state). This is
906 * especially true in disable hooks because the pipeline will change.
907 *
908 * Returns: The new connector connected to @encoder, or NULL if the encoder is
909 * not connected.
910 */
911struct drm_connector *
912drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state,
913 struct drm_encoder *encoder)
914{
915 struct drm_connector_state *conn_state;
916 struct drm_connector *connector;
917 unsigned int i;
918
919 for_each_new_connector_in_state(state, connector, conn_state, i) {
920 if (conn_state->best_encoder == encoder)
921 return connector;
922 }
923
924 return NULL;
925}
926EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);
927
928/**
929 * drm_atomic_get_connector_state - get connector state
930 * @state: global atomic state object
931 * @connector: connector to get state object for
932 *
933 * This function returns the connector state for the given connector,
934 * allocating it if needed. It will also grab the relevant connector lock to
935 * make sure that the state is consistent.
936 *
937 * Returns:
938 *
939 * Either the allocated state or the error code encoded into the pointer. When
940 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
941 * entire atomic sequence must be restarted. All other errors are fatal.
942 */
943struct drm_connector_state *
944drm_atomic_get_connector_state(struct drm_atomic_state *state,
945 struct drm_connector *connector)
946{
947 int ret, index;
948 struct drm_mode_config *config = &connector->dev->mode_config;
949 struct drm_connector_state *connector_state;
950
951 WARN_ON(!state->acquire_ctx);
952
953 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
954 if (ret)
955 return ERR_PTR(ret);
956
957 index = drm_connector_index(connector);
958
959 if (index >= state->num_connector) {
960 struct __drm_connnectors_state *c;
961 int alloc = max(index + 1, config->num_connector);
962
963 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
964 if (!c)
965 return ERR_PTR(-ENOMEM);
966
967 state->connectors = c;
968 memset(&state->connectors[state->num_connector], 0,
969 sizeof(*state->connectors) * (alloc - state->num_connector));
970
971 state->num_connector = alloc;
972 }
973
974 if (state->connectors[index].state)
975 return state->connectors[index].state;
976
977 connector_state = connector->funcs->atomic_duplicate_state(connector);
978 if (!connector_state)
979 return ERR_PTR(-ENOMEM);
980
981 drm_connector_get(connector);
982 state->connectors[index].state = connector_state;
983 state->connectors[index].old_state = connector->state;
984 state->connectors[index].new_state = connector_state;
985 state->connectors[index].ptr = connector;
986 connector_state->state = state;
987
988 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n",
989 connector->base.id, connector->name,
990 connector_state, state);
991
992 if (connector_state->crtc) {
993 struct drm_crtc_state *crtc_state;
994
995 crtc_state = drm_atomic_get_crtc_state(state,
996 connector_state->crtc);
997 if (IS_ERR(crtc_state))
998 return ERR_CAST(crtc_state);
999 }
1000
1001 return connector_state;
1002}
1003EXPORT_SYMBOL(drm_atomic_get_connector_state);
1004
1005static void drm_atomic_connector_print_state(struct drm_printer *p,
1006 const struct drm_connector_state *state)
1007{
1008 struct drm_connector *connector = state->connector;
1009
1010 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1011 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1012 drm_printf(p, "\tself_refresh_aware=%d\n", state->self_refresh_aware);
1013
1014 if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
1015 if (state->writeback_job && state->writeback_job->fb)
1016 drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id);
1017
1018 if (connector->funcs->atomic_print_state)
1019 connector->funcs->atomic_print_state(p, state);
1020}
1021
1022/**
1023 * drm_atomic_get_bridge_state - get bridge state
1024 * @state: global atomic state object
1025 * @bridge: bridge to get state object for
1026 *
1027 * This function returns the bridge state for the given bridge, allocating it
1028 * if needed. It will also grab the relevant bridge lock to make sure that the
1029 * state is consistent.
1030 *
1031 * Returns:
1032 *
1033 * Either the allocated state or the error code encoded into the pointer. When
1034 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1035 * entire atomic sequence must be restarted.
1036 */
1037struct drm_bridge_state *
1038drm_atomic_get_bridge_state(struct drm_atomic_state *state,
1039 struct drm_bridge *bridge)
1040{
1041 struct drm_private_state *obj_state;
1042
1043 obj_state = drm_atomic_get_private_obj_state(state, &bridge->base);
1044 if (IS_ERR(obj_state))
1045 return ERR_CAST(obj_state);
1046
1047 return drm_priv_to_bridge_state(obj_state);
1048}
1049EXPORT_SYMBOL(drm_atomic_get_bridge_state);
1050
1051/**
1052 * drm_atomic_get_old_bridge_state - get old bridge state, if it exists
1053 * @state: global atomic state object
1054 * @bridge: bridge to grab
1055 *
1056 * This function returns the old bridge state for the given bridge, or NULL if
1057 * the bridge is not part of the global atomic state.
1058 */
1059struct drm_bridge_state *
1060drm_atomic_get_old_bridge_state(struct drm_atomic_state *state,
1061 struct drm_bridge *bridge)
1062{
1063 struct drm_private_state *obj_state;
1064
1065 obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base);
1066 if (!obj_state)
1067 return NULL;
1068
1069 return drm_priv_to_bridge_state(obj_state);
1070}
1071EXPORT_SYMBOL(drm_atomic_get_old_bridge_state);
1072
1073/**
1074 * drm_atomic_get_new_bridge_state - get new bridge state, if it exists
1075 * @state: global atomic state object
1076 * @bridge: bridge to grab
1077 *
1078 * This function returns the new bridge state for the given bridge, or NULL if
1079 * the bridge is not part of the global atomic state.
1080 */
1081struct drm_bridge_state *
1082drm_atomic_get_new_bridge_state(struct drm_atomic_state *state,
1083 struct drm_bridge *bridge)
1084{
1085 struct drm_private_state *obj_state;
1086
1087 obj_state = drm_atomic_get_new_private_obj_state(state, &bridge->base);
1088 if (!obj_state)
1089 return NULL;
1090
1091 return drm_priv_to_bridge_state(obj_state);
1092}
1093EXPORT_SYMBOL(drm_atomic_get_new_bridge_state);
1094
1095/**
1096 * drm_atomic_add_encoder_bridges - add bridges attached to an encoder
1097 * @state: atomic state
1098 * @encoder: DRM encoder
1099 *
1100 * This function adds all bridges attached to @encoder. This is needed to add
1101 * bridge states to @state and make them available when
1102 * &drm_bridge_funcs.atomic_check(), &drm_bridge_funcs.atomic_pre_enable(),
1103 * &drm_bridge_funcs.atomic_enable(),
1104 * &drm_bridge_funcs.atomic_disable_post_disable() are called.
1105 *
1106 * Returns:
1107 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1108 * then the w/w mutex code has detected a deadlock and the entire atomic
1109 * sequence must be restarted. All other errors are fatal.
1110 */
1111int
1112drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,
1113 struct drm_encoder *encoder)
1114{
1115 struct drm_bridge_state *bridge_state;
1116 struct drm_bridge *bridge;
1117
1118 if (!encoder)
1119 return 0;
1120
1121 DRM_DEBUG_ATOMIC("Adding all bridges for [encoder:%d:%s] to %p\n",
1122 encoder->base.id, encoder->name, state);
1123
1124 drm_for_each_bridge_in_chain(encoder, bridge) {
1125 /* Skip bridges that don't implement the atomic state hooks. */
1126 if (!bridge->funcs->atomic_duplicate_state)
1127 continue;
1128
1129 bridge_state = drm_atomic_get_bridge_state(state, bridge);
1130 if (IS_ERR(bridge_state))
1131 return PTR_ERR(bridge_state);
1132 }
1133
1134 return 0;
1135}
1136EXPORT_SYMBOL(drm_atomic_add_encoder_bridges);
1137
1138/**
1139 * drm_atomic_add_affected_connectors - add connectors for CRTC
1140 * @state: atomic state
1141 * @crtc: DRM CRTC
1142 *
1143 * This function walks the current configuration and adds all connectors
1144 * currently using @crtc to the atomic configuration @state. Note that this
1145 * function must acquire the connection mutex. This can potentially cause
1146 * unneeded seralization if the update is just for the planes on one CRTC. Hence
1147 * drivers and helpers should only call this when really needed (e.g. when a
1148 * full modeset needs to happen due to some change).
1149 *
1150 * Returns:
1151 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1152 * then the w/w mutex code has detected a deadlock and the entire atomic
1153 * sequence must be restarted. All other errors are fatal.
1154 */
1155int
1156drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1157 struct drm_crtc *crtc)
1158{
1159 struct drm_mode_config *config = &state->dev->mode_config;
1160 struct drm_connector *connector;
1161 struct drm_connector_state *conn_state;
1162 struct drm_connector_list_iter conn_iter;
1163 struct drm_crtc_state *crtc_state;
1164 int ret;
1165
1166 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1167 if (IS_ERR(crtc_state))
1168 return PTR_ERR(crtc_state);
1169
1170 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1171 if (ret)
1172 return ret;
1173
1174 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1175 crtc->base.id, crtc->name, state);
1176
1177 /*
1178 * Changed connectors are already in @state, so only need to look
1179 * at the connector_mask in crtc_state.
1180 */
1181 drm_connector_list_iter_begin(state->dev, &conn_iter);
1182 drm_for_each_connector_iter(connector, &conn_iter) {
1183 if (!(crtc_state->connector_mask & drm_connector_mask(connector)))
1184 continue;
1185
1186 conn_state = drm_atomic_get_connector_state(state, connector);
1187 if (IS_ERR(conn_state)) {
1188 drm_connector_list_iter_end(&conn_iter);
1189 return PTR_ERR(conn_state);
1190 }
1191 }
1192 drm_connector_list_iter_end(&conn_iter);
1193
1194 return 0;
1195}
1196EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1197
1198/**
1199 * drm_atomic_add_affected_planes - add planes for CRTC
1200 * @state: atomic state
1201 * @crtc: DRM CRTC
1202 *
1203 * This function walks the current configuration and adds all planes
1204 * currently used by @crtc to the atomic configuration @state. This is useful
1205 * when an atomic commit also needs to check all currently enabled plane on
1206 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1207 * to avoid special code to force-enable all planes.
1208 *
1209 * Since acquiring a plane state will always also acquire the w/w mutex of the
1210 * current CRTC for that plane (if there is any) adding all the plane states for
1211 * a CRTC will not reduce parallism of atomic updates.
1212 *
1213 * Returns:
1214 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1215 * then the w/w mutex code has detected a deadlock and the entire atomic
1216 * sequence must be restarted. All other errors are fatal.
1217 */
1218int
1219drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1220 struct drm_crtc *crtc)
1221{
1222 const struct drm_crtc_state *old_crtc_state =
1223 drm_atomic_get_old_crtc_state(state, crtc);
1224 struct drm_plane *plane;
1225
1226 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1227
1228 DRM_DEBUG_ATOMIC("Adding all current planes for [CRTC:%d:%s] to %p\n",
1229 crtc->base.id, crtc->name, state);
1230
1231 drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) {
1232 struct drm_plane_state *plane_state =
1233 drm_atomic_get_plane_state(state, plane);
1234
1235 if (IS_ERR(plane_state))
1236 return PTR_ERR(plane_state);
1237 }
1238 return 0;
1239}
1240EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1241
1242/**
1243 * drm_atomic_check_only - check whether a given config would work
1244 * @state: atomic configuration to check
1245 *
1246 * Note that this function can return -EDEADLK if the driver needed to acquire
1247 * more locks but encountered a deadlock. The caller must then do the usual w/w
1248 * backoff dance and restart. All other errors are fatal.
1249 *
1250 * Returns:
1251 * 0 on success, negative error code on failure.
1252 */
1253int drm_atomic_check_only(struct drm_atomic_state *state)
1254{
1255 struct drm_device *dev = state->dev;
1256 struct drm_mode_config *config = &dev->mode_config;
1257 struct drm_plane *plane;
1258 struct drm_plane_state *old_plane_state;
1259 struct drm_plane_state *new_plane_state;
1260 struct drm_crtc *crtc;
1261 struct drm_crtc_state *old_crtc_state;
1262 struct drm_crtc_state *new_crtc_state;
1263 struct drm_connector *conn;
1264 struct drm_connector_state *conn_state;
1265 int i, ret = 0;
1266
1267 DRM_DEBUG_ATOMIC("checking %p\n", state);
1268
1269 for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
1270 ret = drm_atomic_plane_check(old_plane_state, new_plane_state);
1271 if (ret) {
1272 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1273 plane->base.id, plane->name);
1274 return ret;
1275 }
1276 }
1277
1278 for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1279 ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state);
1280 if (ret) {
1281 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1282 crtc->base.id, crtc->name);
1283 return ret;
1284 }
1285 }
1286
1287 for_each_new_connector_in_state(state, conn, conn_state, i) {
1288 ret = drm_atomic_connector_check(conn, conn_state);
1289 if (ret) {
1290 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] atomic core check failed\n",
1291 conn->base.id, conn->name);
1292 return ret;
1293 }
1294 }
1295
1296 if (config->funcs->atomic_check) {
1297 ret = config->funcs->atomic_check(state->dev, state);
1298
1299 if (ret) {
1300 DRM_DEBUG_ATOMIC("atomic driver check for %p failed: %d\n",
1301 state, ret);
1302 return ret;
1303 }
1304 }
1305
1306 if (!state->allow_modeset) {
1307 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1308 if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
1309 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1310 crtc->base.id, crtc->name);
1311 return -EINVAL;
1312 }
1313 }
1314 }
1315
1316 return 0;
1317}
1318EXPORT_SYMBOL(drm_atomic_check_only);
1319
1320/**
1321 * drm_atomic_commit - commit configuration atomically
1322 * @state: atomic configuration to check
1323 *
1324 * Note that this function can return -EDEADLK if the driver needed to acquire
1325 * more locks but encountered a deadlock. The caller must then do the usual w/w
1326 * backoff dance and restart. All other errors are fatal.
1327 *
1328 * This function will take its own reference on @state.
1329 * Callers should always release their reference with drm_atomic_state_put().
1330 *
1331 * Returns:
1332 * 0 on success, negative error code on failure.
1333 */
1334int drm_atomic_commit(struct drm_atomic_state *state)
1335{
1336 struct drm_mode_config *config = &state->dev->mode_config;
1337 int ret;
1338
1339 ret = drm_atomic_check_only(state);
1340 if (ret)
1341 return ret;
1342
1343 DRM_DEBUG_ATOMIC("committing %p\n", state);
1344
1345 return config->funcs->atomic_commit(state->dev, state, false);
1346}
1347EXPORT_SYMBOL(drm_atomic_commit);
1348
1349/**
1350 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1351 * @state: atomic configuration to check
1352 *
1353 * Note that this function can return -EDEADLK if the driver needed to acquire
1354 * more locks but encountered a deadlock. The caller must then do the usual w/w
1355 * backoff dance and restart. All other errors are fatal.
1356 *
1357 * This function will take its own reference on @state.
1358 * Callers should always release their reference with drm_atomic_state_put().
1359 *
1360 * Returns:
1361 * 0 on success, negative error code on failure.
1362 */
1363int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1364{
1365 struct drm_mode_config *config = &state->dev->mode_config;
1366 int ret;
1367
1368 ret = drm_atomic_check_only(state);
1369 if (ret)
1370 return ret;
1371
1372 DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state);
1373
1374 return config->funcs->atomic_commit(state->dev, state, true);
1375}
1376EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1377
1378/* just used from drm-client and atomic-helper: */
1379int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
1380 struct drm_plane_state *plane_state)
1381{
1382 int ret;
1383
1384 ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
1385 if (ret != 0)
1386 return ret;
1387
1388 drm_atomic_set_fb_for_plane(plane_state, NULL);
1389 plane_state->crtc_x = 0;
1390 plane_state->crtc_y = 0;
1391 plane_state->crtc_w = 0;
1392 plane_state->crtc_h = 0;
1393 plane_state->src_x = 0;
1394 plane_state->src_y = 0;
1395 plane_state->src_w = 0;
1396 plane_state->src_h = 0;
1397
1398 return 0;
1399}
1400EXPORT_SYMBOL(__drm_atomic_helper_disable_plane);
1401
1402static int update_output_state(struct drm_atomic_state *state,
1403 struct drm_mode_set *set)
1404{
1405 struct drm_device *dev = set->crtc->dev;
1406 struct drm_crtc *crtc;
1407 struct drm_crtc_state *new_crtc_state;
1408 struct drm_connector *connector;
1409 struct drm_connector_state *new_conn_state;
1410 int ret, i;
1411
1412 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
1413 state->acquire_ctx);
1414 if (ret)
1415 return ret;
1416
1417 /* First disable all connectors on the target crtc. */
1418 ret = drm_atomic_add_affected_connectors(state, set->crtc);
1419 if (ret)
1420 return ret;
1421
1422 for_each_new_connector_in_state(state, connector, new_conn_state, i) {
1423 if (new_conn_state->crtc == set->crtc) {
1424 ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1425 NULL);
1426 if (ret)
1427 return ret;
1428
1429 /* Make sure legacy setCrtc always re-trains */
1430 new_conn_state->link_status = DRM_LINK_STATUS_GOOD;
1431 }
1432 }
1433
1434 /* Then set all connectors from set->connectors on the target crtc */
1435 for (i = 0; i < set->num_connectors; i++) {
1436 new_conn_state = drm_atomic_get_connector_state(state,
1437 set->connectors[i]);
1438 if (IS_ERR(new_conn_state))
1439 return PTR_ERR(new_conn_state);
1440
1441 ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1442 set->crtc);
1443 if (ret)
1444 return ret;
1445 }
1446
1447 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1448 /*
1449 * Don't update ->enable for the CRTC in the set_config request,
1450 * since a mismatch would indicate a bug in the upper layers.
1451 * The actual modeset code later on will catch any
1452 * inconsistencies here.
1453 */
1454 if (crtc == set->crtc)
1455 continue;
1456
1457 if (!new_crtc_state->connector_mask) {
1458 ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state,
1459 NULL);
1460 if (ret < 0)
1461 return ret;
1462
1463 new_crtc_state->active = false;
1464 }
1465 }
1466
1467 return 0;
1468}
1469
1470/* just used from drm-client and atomic-helper: */
1471int __drm_atomic_helper_set_config(struct drm_mode_set *set,
1472 struct drm_atomic_state *state)
1473{
1474 struct drm_crtc_state *crtc_state;
1475 struct drm_plane_state *primary_state;
1476 struct drm_crtc *crtc = set->crtc;
1477 int hdisplay, vdisplay;
1478 int ret;
1479
1480 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1481 if (IS_ERR(crtc_state))
1482 return PTR_ERR(crtc_state);
1483
1484 primary_state = drm_atomic_get_plane_state(state, crtc->primary);
1485 if (IS_ERR(primary_state))
1486 return PTR_ERR(primary_state);
1487
1488 if (!set->mode) {
1489 WARN_ON(set->fb);
1490 WARN_ON(set->num_connectors);
1491
1492 ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
1493 if (ret != 0)
1494 return ret;
1495
1496 crtc_state->active = false;
1497
1498 ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
1499 if (ret != 0)
1500 return ret;
1501
1502 drm_atomic_set_fb_for_plane(primary_state, NULL);
1503
1504 goto commit;
1505 }
1506
1507 WARN_ON(!set->fb);
1508 WARN_ON(!set->num_connectors);
1509
1510 ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
1511 if (ret != 0)
1512 return ret;
1513
1514 crtc_state->active = true;
1515
1516 ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
1517 if (ret != 0)
1518 return ret;
1519
1520 drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay);
1521
1522 drm_atomic_set_fb_for_plane(primary_state, set->fb);
1523 primary_state->crtc_x = 0;
1524 primary_state->crtc_y = 0;
1525 primary_state->crtc_w = hdisplay;
1526 primary_state->crtc_h = vdisplay;
1527 primary_state->src_x = set->x << 16;
1528 primary_state->src_y = set->y << 16;
1529 if (drm_rotation_90_or_270(primary_state->rotation)) {
1530 primary_state->src_w = vdisplay << 16;
1531 primary_state->src_h = hdisplay << 16;
1532 } else {
1533 primary_state->src_w = hdisplay << 16;
1534 primary_state->src_h = vdisplay << 16;
1535 }
1536
1537commit:
1538 ret = update_output_state(state, set);
1539 if (ret)
1540 return ret;
1541
1542 return 0;
1543}
1544EXPORT_SYMBOL(__drm_atomic_helper_set_config);
1545
1546void drm_atomic_print_state(const struct drm_atomic_state *state)
1547{
1548 struct drm_printer p = drm_info_printer(state->dev->dev);
1549 struct drm_plane *plane;
1550 struct drm_plane_state *plane_state;
1551 struct drm_crtc *crtc;
1552 struct drm_crtc_state *crtc_state;
1553 struct drm_connector *connector;
1554 struct drm_connector_state *connector_state;
1555 int i;
1556
1557 DRM_DEBUG_ATOMIC("checking %p\n", state);
1558
1559 for_each_new_plane_in_state(state, plane, plane_state, i)
1560 drm_atomic_plane_print_state(&p, plane_state);
1561
1562 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1563 drm_atomic_crtc_print_state(&p, crtc_state);
1564
1565 for_each_new_connector_in_state(state, connector, connector_state, i)
1566 drm_atomic_connector_print_state(&p, connector_state);
1567}
1568
1569static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1570 bool take_locks)
1571{
1572 struct drm_mode_config *config = &dev->mode_config;
1573 struct drm_plane *plane;
1574 struct drm_crtc *crtc;
1575 struct drm_connector *connector;
1576 struct drm_connector_list_iter conn_iter;
1577
1578 if (!drm_drv_uses_atomic_modeset(dev))
1579 return;
1580
1581 list_for_each_entry(plane, &config->plane_list, head) {
1582 if (take_locks)
1583 drm_modeset_lock(&plane->mutex, NULL);
1584 drm_atomic_plane_print_state(p, plane->state);
1585 if (take_locks)
1586 drm_modeset_unlock(&plane->mutex);
1587 }
1588
1589 list_for_each_entry(crtc, &config->crtc_list, head) {
1590 if (take_locks)
1591 drm_modeset_lock(&crtc->mutex, NULL);
1592 drm_atomic_crtc_print_state(p, crtc->state);
1593 if (take_locks)
1594 drm_modeset_unlock(&crtc->mutex);
1595 }
1596
1597 drm_connector_list_iter_begin(dev, &conn_iter);
1598 if (take_locks)
1599 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1600 drm_for_each_connector_iter(connector, &conn_iter)
1601 drm_atomic_connector_print_state(p, connector->state);
1602 if (take_locks)
1603 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1604 drm_connector_list_iter_end(&conn_iter);
1605}
1606
1607/**
1608 * drm_state_dump - dump entire device atomic state
1609 * @dev: the drm device
1610 * @p: where to print the state to
1611 *
1612 * Just for debugging. Drivers might want an option to dump state
1613 * to dmesg in case of error irq's. (Hint, you probably want to
1614 * ratelimit this!)
1615 *
1616 * The caller must drm_modeset_lock_all(), or if this is called
1617 * from error irq handler, it should not be enabled by default.
1618 * (Ie. if you are debugging errors you might not care that this
1619 * is racey. But calling this without all modeset locks held is
1620 * not inherently safe.)
1621 */
1622void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1623{
1624 __drm_state_dump(dev, p, false);
1625}
1626EXPORT_SYMBOL(drm_state_dump);
1627
1628#ifdef CONFIG_DEBUG_FS
1629static int drm_state_info(struct seq_file *m, void *data)
1630{
1631 struct drm_info_node *node = (struct drm_info_node *) m->private;
1632 struct drm_device *dev = node->minor->dev;
1633 struct drm_printer p = drm_seq_file_printer(m);
1634
1635 __drm_state_dump(dev, &p, true);
1636
1637 return 0;
1638}
1639
1640/* any use in debugfs files to dump individual planes/crtc/etc? */
1641static const struct drm_info_list drm_atomic_debugfs_list[] = {
1642 {"state", drm_state_info, 0},
1643};
1644
1645void drm_atomic_debugfs_init(struct drm_minor *minor)
1646{
1647 drm_debugfs_create_files(drm_atomic_debugfs_list,
1648 ARRAY_SIZE(drm_atomic_debugfs_list),
1649 minor->debugfs_root, minor);
1650}
1651#endif
1/*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
26 */
27
28
29#include <drm/drmP.h>
30#include <drm/drm_atomic.h>
31#include <drm/drm_mode.h>
32#include <drm/drm_print.h>
33#include <linux/sync_file.h>
34
35#include "drm_crtc_internal.h"
36#include "drm_internal.h"
37
38void __drm_crtc_commit_free(struct kref *kref)
39{
40 struct drm_crtc_commit *commit =
41 container_of(kref, struct drm_crtc_commit, ref);
42
43 kfree(commit);
44}
45EXPORT_SYMBOL(__drm_crtc_commit_free);
46
47/**
48 * drm_atomic_state_default_release -
49 * release memory initialized by drm_atomic_state_init
50 * @state: atomic state
51 *
52 * Free all the memory allocated by drm_atomic_state_init.
53 * This should only be used by drivers which are still subclassing
54 * &drm_atomic_state and haven't switched to &drm_private_state yet.
55 */
56void drm_atomic_state_default_release(struct drm_atomic_state *state)
57{
58 kfree(state->connectors);
59 kfree(state->crtcs);
60 kfree(state->planes);
61 kfree(state->private_objs);
62}
63EXPORT_SYMBOL(drm_atomic_state_default_release);
64
65/**
66 * drm_atomic_state_init - init new atomic state
67 * @dev: DRM device
68 * @state: atomic state
69 *
70 * Default implementation for filling in a new atomic state.
71 * This should only be used by drivers which are still subclassing
72 * &drm_atomic_state and haven't switched to &drm_private_state yet.
73 */
74int
75drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
76{
77 kref_init(&state->ref);
78
79 /* TODO legacy paths should maybe do a better job about
80 * setting this appropriately?
81 */
82 state->allow_modeset = true;
83
84 state->crtcs = kcalloc(dev->mode_config.num_crtc,
85 sizeof(*state->crtcs), GFP_KERNEL);
86 if (!state->crtcs)
87 goto fail;
88 state->planes = kcalloc(dev->mode_config.num_total_plane,
89 sizeof(*state->planes), GFP_KERNEL);
90 if (!state->planes)
91 goto fail;
92
93 state->dev = dev;
94
95 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state);
96
97 return 0;
98fail:
99 drm_atomic_state_default_release(state);
100 return -ENOMEM;
101}
102EXPORT_SYMBOL(drm_atomic_state_init);
103
104/**
105 * drm_atomic_state_alloc - allocate atomic state
106 * @dev: DRM device
107 *
108 * This allocates an empty atomic state to track updates.
109 */
110struct drm_atomic_state *
111drm_atomic_state_alloc(struct drm_device *dev)
112{
113 struct drm_mode_config *config = &dev->mode_config;
114
115 if (!config->funcs->atomic_state_alloc) {
116 struct drm_atomic_state *state;
117
118 state = kzalloc(sizeof(*state), GFP_KERNEL);
119 if (!state)
120 return NULL;
121 if (drm_atomic_state_init(dev, state) < 0) {
122 kfree(state);
123 return NULL;
124 }
125 return state;
126 }
127
128 return config->funcs->atomic_state_alloc(dev);
129}
130EXPORT_SYMBOL(drm_atomic_state_alloc);
131
132/**
133 * drm_atomic_state_default_clear - clear base atomic state
134 * @state: atomic state
135 *
136 * Default implementation for clearing atomic state.
137 * This should only be used by drivers which are still subclassing
138 * &drm_atomic_state and haven't switched to &drm_private_state yet.
139 */
140void drm_atomic_state_default_clear(struct drm_atomic_state *state)
141{
142 struct drm_device *dev = state->dev;
143 struct drm_mode_config *config = &dev->mode_config;
144 int i;
145
146 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state);
147
148 for (i = 0; i < state->num_connector; i++) {
149 struct drm_connector *connector = state->connectors[i].ptr;
150
151 if (!connector)
152 continue;
153
154 connector->funcs->atomic_destroy_state(connector,
155 state->connectors[i].state);
156 state->connectors[i].ptr = NULL;
157 state->connectors[i].state = NULL;
158 state->connectors[i].old_state = NULL;
159 state->connectors[i].new_state = NULL;
160 drm_connector_put(connector);
161 }
162
163 for (i = 0; i < config->num_crtc; i++) {
164 struct drm_crtc *crtc = state->crtcs[i].ptr;
165
166 if (!crtc)
167 continue;
168
169 crtc->funcs->atomic_destroy_state(crtc,
170 state->crtcs[i].state);
171
172 state->crtcs[i].ptr = NULL;
173 state->crtcs[i].state = NULL;
174 state->crtcs[i].old_state = NULL;
175 state->crtcs[i].new_state = NULL;
176 }
177
178 for (i = 0; i < config->num_total_plane; i++) {
179 struct drm_plane *plane = state->planes[i].ptr;
180
181 if (!plane)
182 continue;
183
184 plane->funcs->atomic_destroy_state(plane,
185 state->planes[i].state);
186 state->planes[i].ptr = NULL;
187 state->planes[i].state = NULL;
188 state->planes[i].old_state = NULL;
189 state->planes[i].new_state = NULL;
190 }
191
192 for (i = 0; i < state->num_private_objs; i++) {
193 struct drm_private_obj *obj = state->private_objs[i].ptr;
194
195 obj->funcs->atomic_destroy_state(obj,
196 state->private_objs[i].state);
197 state->private_objs[i].ptr = NULL;
198 state->private_objs[i].state = NULL;
199 state->private_objs[i].old_state = NULL;
200 state->private_objs[i].new_state = NULL;
201 }
202 state->num_private_objs = 0;
203
204 if (state->fake_commit) {
205 drm_crtc_commit_put(state->fake_commit);
206 state->fake_commit = NULL;
207 }
208}
209EXPORT_SYMBOL(drm_atomic_state_default_clear);
210
211/**
212 * drm_atomic_state_clear - clear state object
213 * @state: atomic state
214 *
215 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
216 * all locks. So someone else could sneak in and change the current modeset
217 * configuration. Which means that all the state assembled in @state is no
218 * longer an atomic update to the current state, but to some arbitrary earlier
219 * state. Which could break assumptions the driver's
220 * &drm_mode_config_funcs.atomic_check likely relies on.
221 *
222 * Hence we must clear all cached state and completely start over, using this
223 * function.
224 */
225void drm_atomic_state_clear(struct drm_atomic_state *state)
226{
227 struct drm_device *dev = state->dev;
228 struct drm_mode_config *config = &dev->mode_config;
229
230 if (config->funcs->atomic_state_clear)
231 config->funcs->atomic_state_clear(state);
232 else
233 drm_atomic_state_default_clear(state);
234}
235EXPORT_SYMBOL(drm_atomic_state_clear);
236
237/**
238 * __drm_atomic_state_free - free all memory for an atomic state
239 * @ref: This atomic state to deallocate
240 *
241 * This frees all memory associated with an atomic state, including all the
242 * per-object state for planes, crtcs and connectors.
243 */
244void __drm_atomic_state_free(struct kref *ref)
245{
246 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
247 struct drm_mode_config *config = &state->dev->mode_config;
248
249 drm_atomic_state_clear(state);
250
251 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
252
253 if (config->funcs->atomic_state_free) {
254 config->funcs->atomic_state_free(state);
255 } else {
256 drm_atomic_state_default_release(state);
257 kfree(state);
258 }
259}
260EXPORT_SYMBOL(__drm_atomic_state_free);
261
262/**
263 * drm_atomic_get_crtc_state - get crtc state
264 * @state: global atomic state object
265 * @crtc: crtc to get state object for
266 *
267 * This function returns the crtc state for the given crtc, allocating it if
268 * needed. It will also grab the relevant crtc lock to make sure that the state
269 * is consistent.
270 *
271 * Returns:
272 *
273 * Either the allocated state or the error code encoded into the pointer. When
274 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
275 * entire atomic sequence must be restarted. All other errors are fatal.
276 */
277struct drm_crtc_state *
278drm_atomic_get_crtc_state(struct drm_atomic_state *state,
279 struct drm_crtc *crtc)
280{
281 int ret, index = drm_crtc_index(crtc);
282 struct drm_crtc_state *crtc_state;
283
284 WARN_ON(!state->acquire_ctx);
285
286 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
287 if (crtc_state)
288 return crtc_state;
289
290 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
291 if (ret)
292 return ERR_PTR(ret);
293
294 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
295 if (!crtc_state)
296 return ERR_PTR(-ENOMEM);
297
298 state->crtcs[index].state = crtc_state;
299 state->crtcs[index].old_state = crtc->state;
300 state->crtcs[index].new_state = crtc_state;
301 state->crtcs[index].ptr = crtc;
302 crtc_state->state = state;
303
304 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
305 crtc->base.id, crtc->name, crtc_state, state);
306
307 return crtc_state;
308}
309EXPORT_SYMBOL(drm_atomic_get_crtc_state);
310
311static void set_out_fence_for_crtc(struct drm_atomic_state *state,
312 struct drm_crtc *crtc, s32 __user *fence_ptr)
313{
314 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr;
315}
316
317static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state,
318 struct drm_crtc *crtc)
319{
320 s32 __user *fence_ptr;
321
322 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr;
323 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL;
324
325 return fence_ptr;
326}
327
328/**
329 * drm_atomic_set_mode_for_crtc - set mode for CRTC
330 * @state: the CRTC whose incoming state to update
331 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
332 *
333 * Set a mode (originating from the kernel) on the desired CRTC state and update
334 * the enable property.
335 *
336 * RETURNS:
337 * Zero on success, error code on failure. Cannot return -EDEADLK.
338 */
339int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
340 const struct drm_display_mode *mode)
341{
342 struct drm_mode_modeinfo umode;
343
344 /* Early return for no change. */
345 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
346 return 0;
347
348 drm_property_blob_put(state->mode_blob);
349 state->mode_blob = NULL;
350
351 if (mode) {
352 drm_mode_convert_to_umode(&umode, mode);
353 state->mode_blob =
354 drm_property_create_blob(state->crtc->dev,
355 sizeof(umode),
356 &umode);
357 if (IS_ERR(state->mode_blob))
358 return PTR_ERR(state->mode_blob);
359
360 drm_mode_copy(&state->mode, mode);
361 state->enable = true;
362 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
363 mode->name, state);
364 } else {
365 memset(&state->mode, 0, sizeof(state->mode));
366 state->enable = false;
367 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
368 state);
369 }
370
371 return 0;
372}
373EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
374
375/**
376 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
377 * @state: the CRTC whose incoming state to update
378 * @blob: pointer to blob property to use for mode
379 *
380 * Set a mode (originating from a blob property) on the desired CRTC state.
381 * This function will take a reference on the blob property for the CRTC state,
382 * and release the reference held on the state's existing mode property, if any
383 * was set.
384 *
385 * RETURNS:
386 * Zero on success, error code on failure. Cannot return -EDEADLK.
387 */
388int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
389 struct drm_property_blob *blob)
390{
391 if (blob == state->mode_blob)
392 return 0;
393
394 drm_property_blob_put(state->mode_blob);
395 state->mode_blob = NULL;
396
397 memset(&state->mode, 0, sizeof(state->mode));
398
399 if (blob) {
400 if (blob->length != sizeof(struct drm_mode_modeinfo) ||
401 drm_mode_convert_umode(state->crtc->dev, &state->mode,
402 blob->data))
403 return -EINVAL;
404
405 state->mode_blob = drm_property_blob_get(blob);
406 state->enable = true;
407 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
408 state->mode.name, state);
409 } else {
410 state->enable = false;
411 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
412 state);
413 }
414
415 return 0;
416}
417EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
418
419/**
420 * drm_atomic_replace_property_blob_from_id - lookup the new blob and replace the old one with it
421 * @dev: DRM device
422 * @blob: a pointer to the member blob to be replaced
423 * @blob_id: ID of the new blob
424 * @expected_size: total expected size of the blob data (in bytes)
425 * @expected_elem_size: expected element size of the blob data (in bytes)
426 * @replaced: did the blob get replaced?
427 *
428 * Replace @blob with another blob with the ID @blob_id. If @blob_id is zero
429 * @blob becomes NULL.
430 *
431 * If @expected_size is positive the new blob length is expected to be equal
432 * to @expected_size bytes. If @expected_elem_size is positive the new blob
433 * length is expected to be a multiple of @expected_elem_size bytes. Otherwise
434 * an error is returned.
435 *
436 * @replaced will indicate to the caller whether the blob was replaced or not.
437 * If the old and new blobs were in fact the same blob @replaced will be false
438 * otherwise it will be true.
439 *
440 * RETURNS:
441 * Zero on success, error code on failure.
442 */
443static int
444drm_atomic_replace_property_blob_from_id(struct drm_device *dev,
445 struct drm_property_blob **blob,
446 uint64_t blob_id,
447 ssize_t expected_size,
448 ssize_t expected_elem_size,
449 bool *replaced)
450{
451 struct drm_property_blob *new_blob = NULL;
452
453 if (blob_id != 0) {
454 new_blob = drm_property_lookup_blob(dev, blob_id);
455 if (new_blob == NULL)
456 return -EINVAL;
457
458 if (expected_size > 0 &&
459 new_blob->length != expected_size) {
460 drm_property_blob_put(new_blob);
461 return -EINVAL;
462 }
463 if (expected_elem_size > 0 &&
464 new_blob->length % expected_elem_size != 0) {
465 drm_property_blob_put(new_blob);
466 return -EINVAL;
467 }
468 }
469
470 *replaced |= drm_property_replace_blob(blob, new_blob);
471 drm_property_blob_put(new_blob);
472
473 return 0;
474}
475
476/**
477 * drm_atomic_crtc_set_property - set property on CRTC
478 * @crtc: the drm CRTC to set a property on
479 * @state: the state object to update with the new property value
480 * @property: the property to set
481 * @val: the new property value
482 *
483 * This function handles generic/core properties and calls out to driver's
484 * &drm_crtc_funcs.atomic_set_property for driver properties. To ensure
485 * consistent behavior you must call this function rather than the driver hook
486 * directly.
487 *
488 * RETURNS:
489 * Zero on success, error code on failure
490 */
491int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
492 struct drm_crtc_state *state, struct drm_property *property,
493 uint64_t val)
494{
495 struct drm_device *dev = crtc->dev;
496 struct drm_mode_config *config = &dev->mode_config;
497 bool replaced = false;
498 int ret;
499
500 if (property == config->prop_active)
501 state->active = val;
502 else if (property == config->prop_mode_id) {
503 struct drm_property_blob *mode =
504 drm_property_lookup_blob(dev, val);
505 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
506 drm_property_blob_put(mode);
507 return ret;
508 } else if (property == config->degamma_lut_property) {
509 ret = drm_atomic_replace_property_blob_from_id(dev,
510 &state->degamma_lut,
511 val,
512 -1, sizeof(struct drm_color_lut),
513 &replaced);
514 state->color_mgmt_changed |= replaced;
515 return ret;
516 } else if (property == config->ctm_property) {
517 ret = drm_atomic_replace_property_blob_from_id(dev,
518 &state->ctm,
519 val,
520 sizeof(struct drm_color_ctm), -1,
521 &replaced);
522 state->color_mgmt_changed |= replaced;
523 return ret;
524 } else if (property == config->gamma_lut_property) {
525 ret = drm_atomic_replace_property_blob_from_id(dev,
526 &state->gamma_lut,
527 val,
528 -1, sizeof(struct drm_color_lut),
529 &replaced);
530 state->color_mgmt_changed |= replaced;
531 return ret;
532 } else if (property == config->prop_out_fence_ptr) {
533 s32 __user *fence_ptr = u64_to_user_ptr(val);
534
535 if (!fence_ptr)
536 return 0;
537
538 if (put_user(-1, fence_ptr))
539 return -EFAULT;
540
541 set_out_fence_for_crtc(state->state, crtc, fence_ptr);
542 } else if (crtc->funcs->atomic_set_property)
543 return crtc->funcs->atomic_set_property(crtc, state, property, val);
544 else
545 return -EINVAL;
546
547 return 0;
548}
549EXPORT_SYMBOL(drm_atomic_crtc_set_property);
550
551/**
552 * drm_atomic_crtc_get_property - get property value from CRTC state
553 * @crtc: the drm CRTC to set a property on
554 * @state: the state object to get the property value from
555 * @property: the property to set
556 * @val: return location for the property value
557 *
558 * This function handles generic/core properties and calls out to driver's
559 * &drm_crtc_funcs.atomic_get_property for driver properties. To ensure
560 * consistent behavior you must call this function rather than the driver hook
561 * directly.
562 *
563 * RETURNS:
564 * Zero on success, error code on failure
565 */
566static int
567drm_atomic_crtc_get_property(struct drm_crtc *crtc,
568 const struct drm_crtc_state *state,
569 struct drm_property *property, uint64_t *val)
570{
571 struct drm_device *dev = crtc->dev;
572 struct drm_mode_config *config = &dev->mode_config;
573
574 if (property == config->prop_active)
575 *val = state->active;
576 else if (property == config->prop_mode_id)
577 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
578 else if (property == config->degamma_lut_property)
579 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;
580 else if (property == config->ctm_property)
581 *val = (state->ctm) ? state->ctm->base.id : 0;
582 else if (property == config->gamma_lut_property)
583 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
584 else if (property == config->prop_out_fence_ptr)
585 *val = 0;
586 else if (crtc->funcs->atomic_get_property)
587 return crtc->funcs->atomic_get_property(crtc, state, property, val);
588 else
589 return -EINVAL;
590
591 return 0;
592}
593
594/**
595 * drm_atomic_crtc_check - check crtc state
596 * @crtc: crtc to check
597 * @state: crtc state to check
598 *
599 * Provides core sanity checks for crtc state.
600 *
601 * RETURNS:
602 * Zero on success, error code on failure
603 */
604static int drm_atomic_crtc_check(struct drm_crtc *crtc,
605 struct drm_crtc_state *state)
606{
607 /* NOTE: we explicitly don't enforce constraints such as primary
608 * layer covering entire screen, since that is something we want
609 * to allow (on hw that supports it). For hw that does not, it
610 * should be checked in driver's crtc->atomic_check() vfunc.
611 *
612 * TODO: Add generic modeset state checks once we support those.
613 */
614
615 if (state->active && !state->enable) {
616 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
617 crtc->base.id, crtc->name);
618 return -EINVAL;
619 }
620
621 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
622 * as this is a kernel-internal detail that userspace should never
623 * be able to trigger. */
624 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
625 WARN_ON(state->enable && !state->mode_blob)) {
626 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
627 crtc->base.id, crtc->name);
628 return -EINVAL;
629 }
630
631 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
632 WARN_ON(!state->enable && state->mode_blob)) {
633 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
634 crtc->base.id, crtc->name);
635 return -EINVAL;
636 }
637
638 /*
639 * Reject event generation for when a CRTC is off and stays off.
640 * It wouldn't be hard to implement this, but userspace has a track
641 * record of happily burning through 100% cpu (or worse, crash) when the
642 * display pipe is suspended. To avoid all that fun just reject updates
643 * that ask for events since likely that indicates a bug in the
644 * compositor's drawing loop. This is consistent with the vblank IOCTL
645 * and legacy page_flip IOCTL which also reject service on a disabled
646 * pipe.
647 */
648 if (state->event && !state->active && !crtc->state->active) {
649 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n",
650 crtc->base.id, crtc->name);
651 return -EINVAL;
652 }
653
654 return 0;
655}
656
657static void drm_atomic_crtc_print_state(struct drm_printer *p,
658 const struct drm_crtc_state *state)
659{
660 struct drm_crtc *crtc = state->crtc;
661
662 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
663 drm_printf(p, "\tenable=%d\n", state->enable);
664 drm_printf(p, "\tactive=%d\n", state->active);
665 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
666 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
667 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
668 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
669 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
670 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
671 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
672 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
673 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
674
675 if (crtc->funcs->atomic_print_state)
676 crtc->funcs->atomic_print_state(p, state);
677}
678
679/**
680 * drm_atomic_get_plane_state - get plane state
681 * @state: global atomic state object
682 * @plane: plane to get state object for
683 *
684 * This function returns the plane state for the given plane, allocating it if
685 * needed. It will also grab the relevant plane lock to make sure that the state
686 * is consistent.
687 *
688 * Returns:
689 *
690 * Either the allocated state or the error code encoded into the pointer. When
691 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
692 * entire atomic sequence must be restarted. All other errors are fatal.
693 */
694struct drm_plane_state *
695drm_atomic_get_plane_state(struct drm_atomic_state *state,
696 struct drm_plane *plane)
697{
698 int ret, index = drm_plane_index(plane);
699 struct drm_plane_state *plane_state;
700
701 WARN_ON(!state->acquire_ctx);
702
703 plane_state = drm_atomic_get_existing_plane_state(state, plane);
704 if (plane_state)
705 return plane_state;
706
707 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
708 if (ret)
709 return ERR_PTR(ret);
710
711 plane_state = plane->funcs->atomic_duplicate_state(plane);
712 if (!plane_state)
713 return ERR_PTR(-ENOMEM);
714
715 state->planes[index].state = plane_state;
716 state->planes[index].ptr = plane;
717 state->planes[index].old_state = plane->state;
718 state->planes[index].new_state = plane_state;
719 plane_state->state = state;
720
721 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
722 plane->base.id, plane->name, plane_state, state);
723
724 if (plane_state->crtc) {
725 struct drm_crtc_state *crtc_state;
726
727 crtc_state = drm_atomic_get_crtc_state(state,
728 plane_state->crtc);
729 if (IS_ERR(crtc_state))
730 return ERR_CAST(crtc_state);
731 }
732
733 return plane_state;
734}
735EXPORT_SYMBOL(drm_atomic_get_plane_state);
736
737/**
738 * drm_atomic_plane_set_property - set property on plane
739 * @plane: the drm plane to set a property on
740 * @state: the state object to update with the new property value
741 * @property: the property to set
742 * @val: the new property value
743 *
744 * This function handles generic/core properties and calls out to driver's
745 * &drm_plane_funcs.atomic_set_property for driver properties. To ensure
746 * consistent behavior you must call this function rather than the driver hook
747 * directly.
748 *
749 * RETURNS:
750 * Zero on success, error code on failure
751 */
752static int drm_atomic_plane_set_property(struct drm_plane *plane,
753 struct drm_plane_state *state, struct drm_property *property,
754 uint64_t val)
755{
756 struct drm_device *dev = plane->dev;
757 struct drm_mode_config *config = &dev->mode_config;
758
759 if (property == config->prop_fb_id) {
760 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val);
761 drm_atomic_set_fb_for_plane(state, fb);
762 if (fb)
763 drm_framebuffer_put(fb);
764 } else if (property == config->prop_in_fence_fd) {
765 if (state->fence)
766 return -EINVAL;
767
768 if (U642I64(val) == -1)
769 return 0;
770
771 state->fence = sync_file_get_fence(val);
772 if (!state->fence)
773 return -EINVAL;
774
775 } else if (property == config->prop_crtc_id) {
776 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
777 return drm_atomic_set_crtc_for_plane(state, crtc);
778 } else if (property == config->prop_crtc_x) {
779 state->crtc_x = U642I64(val);
780 } else if (property == config->prop_crtc_y) {
781 state->crtc_y = U642I64(val);
782 } else if (property == config->prop_crtc_w) {
783 state->crtc_w = val;
784 } else if (property == config->prop_crtc_h) {
785 state->crtc_h = val;
786 } else if (property == config->prop_src_x) {
787 state->src_x = val;
788 } else if (property == config->prop_src_y) {
789 state->src_y = val;
790 } else if (property == config->prop_src_w) {
791 state->src_w = val;
792 } else if (property == config->prop_src_h) {
793 state->src_h = val;
794 } else if (property == plane->rotation_property) {
795 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK))
796 return -EINVAL;
797 state->rotation = val;
798 } else if (property == plane->zpos_property) {
799 state->zpos = val;
800 } else if (property == plane->color_encoding_property) {
801 state->color_encoding = val;
802 } else if (property == plane->color_range_property) {
803 state->color_range = val;
804 } else if (plane->funcs->atomic_set_property) {
805 return plane->funcs->atomic_set_property(plane, state,
806 property, val);
807 } else {
808 return -EINVAL;
809 }
810
811 return 0;
812}
813
814/**
815 * drm_atomic_plane_get_property - get property value from plane state
816 * @plane: the drm plane to set a property on
817 * @state: the state object to get the property value from
818 * @property: the property to set
819 * @val: return location for the property value
820 *
821 * This function handles generic/core properties and calls out to driver's
822 * &drm_plane_funcs.atomic_get_property for driver properties. To ensure
823 * consistent behavior you must call this function rather than the driver hook
824 * directly.
825 *
826 * RETURNS:
827 * Zero on success, error code on failure
828 */
829static int
830drm_atomic_plane_get_property(struct drm_plane *plane,
831 const struct drm_plane_state *state,
832 struct drm_property *property, uint64_t *val)
833{
834 struct drm_device *dev = plane->dev;
835 struct drm_mode_config *config = &dev->mode_config;
836
837 if (property == config->prop_fb_id) {
838 *val = (state->fb) ? state->fb->base.id : 0;
839 } else if (property == config->prop_in_fence_fd) {
840 *val = -1;
841 } else if (property == config->prop_crtc_id) {
842 *val = (state->crtc) ? state->crtc->base.id : 0;
843 } else if (property == config->prop_crtc_x) {
844 *val = I642U64(state->crtc_x);
845 } else if (property == config->prop_crtc_y) {
846 *val = I642U64(state->crtc_y);
847 } else if (property == config->prop_crtc_w) {
848 *val = state->crtc_w;
849 } else if (property == config->prop_crtc_h) {
850 *val = state->crtc_h;
851 } else if (property == config->prop_src_x) {
852 *val = state->src_x;
853 } else if (property == config->prop_src_y) {
854 *val = state->src_y;
855 } else if (property == config->prop_src_w) {
856 *val = state->src_w;
857 } else if (property == config->prop_src_h) {
858 *val = state->src_h;
859 } else if (property == plane->rotation_property) {
860 *val = state->rotation;
861 } else if (property == plane->zpos_property) {
862 *val = state->zpos;
863 } else if (property == plane->color_encoding_property) {
864 *val = state->color_encoding;
865 } else if (property == plane->color_range_property) {
866 *val = state->color_range;
867 } else if (plane->funcs->atomic_get_property) {
868 return plane->funcs->atomic_get_property(plane, state, property, val);
869 } else {
870 return -EINVAL;
871 }
872
873 return 0;
874}
875
876static bool
877plane_switching_crtc(struct drm_atomic_state *state,
878 struct drm_plane *plane,
879 struct drm_plane_state *plane_state)
880{
881 if (!plane->state->crtc || !plane_state->crtc)
882 return false;
883
884 if (plane->state->crtc == plane_state->crtc)
885 return false;
886
887 /* This could be refined, but currently there's no helper or driver code
888 * to implement direct switching of active planes nor userspace to take
889 * advantage of more direct plane switching without the intermediate
890 * full OFF state.
891 */
892 return true;
893}
894
895/**
896 * drm_atomic_plane_check - check plane state
897 * @plane: plane to check
898 * @state: plane state to check
899 *
900 * Provides core sanity checks for plane state.
901 *
902 * RETURNS:
903 * Zero on success, error code on failure
904 */
905static int drm_atomic_plane_check(struct drm_plane *plane,
906 struct drm_plane_state *state)
907{
908 unsigned int fb_width, fb_height;
909 int ret;
910
911 /* either *both* CRTC and FB must be set, or neither */
912 if (state->crtc && !state->fb) {
913 DRM_DEBUG_ATOMIC("CRTC set but no FB\n");
914 return -EINVAL;
915 } else if (state->fb && !state->crtc) {
916 DRM_DEBUG_ATOMIC("FB set but no CRTC\n");
917 return -EINVAL;
918 }
919
920 /* if disabled, we don't care about the rest of the state: */
921 if (!state->crtc)
922 return 0;
923
924 /* Check whether this plane is usable on this CRTC */
925 if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) {
926 DRM_DEBUG_ATOMIC("Invalid crtc for plane\n");
927 return -EINVAL;
928 }
929
930 /* Check whether this plane supports the fb pixel format. */
931 ret = drm_plane_check_pixel_format(plane, state->fb->format->format,
932 state->fb->modifier);
933 if (ret) {
934 struct drm_format_name_buf format_name;
935 DRM_DEBUG_ATOMIC("Invalid pixel format %s, modifier 0x%llx\n",
936 drm_get_format_name(state->fb->format->format,
937 &format_name),
938 state->fb->modifier);
939 return ret;
940 }
941
942 /* Give drivers some help against integer overflows */
943 if (state->crtc_w > INT_MAX ||
944 state->crtc_x > INT_MAX - (int32_t) state->crtc_w ||
945 state->crtc_h > INT_MAX ||
946 state->crtc_y > INT_MAX - (int32_t) state->crtc_h) {
947 DRM_DEBUG_ATOMIC("Invalid CRTC coordinates %ux%u+%d+%d\n",
948 state->crtc_w, state->crtc_h,
949 state->crtc_x, state->crtc_y);
950 return -ERANGE;
951 }
952
953 fb_width = state->fb->width << 16;
954 fb_height = state->fb->height << 16;
955
956 /* Make sure source coordinates are inside the fb. */
957 if (state->src_w > fb_width ||
958 state->src_x > fb_width - state->src_w ||
959 state->src_h > fb_height ||
960 state->src_y > fb_height - state->src_h) {
961 DRM_DEBUG_ATOMIC("Invalid source coordinates "
962 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
963 state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
964 state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
965 state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
966 state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10,
967 state->fb->width, state->fb->height);
968 return -ENOSPC;
969 }
970
971 if (plane_switching_crtc(state->state, plane, state)) {
972 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
973 plane->base.id, plane->name);
974 return -EINVAL;
975 }
976
977 return 0;
978}
979
980static void drm_atomic_plane_print_state(struct drm_printer *p,
981 const struct drm_plane_state *state)
982{
983 struct drm_plane *plane = state->plane;
984 struct drm_rect src = drm_plane_state_src(state);
985 struct drm_rect dest = drm_plane_state_dest(state);
986
987 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
988 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
989 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
990 if (state->fb)
991 drm_framebuffer_print_info(p, 2, state->fb);
992 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
993 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
994 drm_printf(p, "\trotation=%x\n", state->rotation);
995 drm_printf(p, "\tcolor-encoding=%s\n",
996 drm_get_color_encoding_name(state->color_encoding));
997 drm_printf(p, "\tcolor-range=%s\n",
998 drm_get_color_range_name(state->color_range));
999
1000 if (plane->funcs->atomic_print_state)
1001 plane->funcs->atomic_print_state(p, state);
1002}
1003
1004/**
1005 * DOC: handling driver private state
1006 *
1007 * Very often the DRM objects exposed to userspace in the atomic modeset api
1008 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
1009 * underlying hardware. Especially for any kind of shared resources (e.g. shared
1010 * clocks, scaler units, bandwidth and fifo limits shared among a group of
1011 * planes or CRTCs, and so on) it makes sense to model these as independent
1012 * objects. Drivers then need to do similar state tracking and commit ordering for
1013 * such private (since not exposed to userpace) objects as the atomic core and
1014 * helpers already provide for connectors, planes and CRTCs.
1015 *
1016 * To make this easier on drivers the atomic core provides some support to track
1017 * driver private state objects using struct &drm_private_obj, with the
1018 * associated state struct &drm_private_state.
1019 *
1020 * Similar to userspace-exposed objects, private state structures can be
1021 * acquired by calling drm_atomic_get_private_obj_state(). Since this function
1022 * does not take care of locking, drivers should wrap it for each type of
1023 * private state object they have with the required call to drm_modeset_lock()
1024 * for the corresponding &drm_modeset_lock.
1025 *
1026 * All private state structures contained in a &drm_atomic_state update can be
1027 * iterated using for_each_oldnew_private_obj_in_state(),
1028 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
1029 * Drivers are recommended to wrap these for each type of driver private state
1030 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
1031 * least if they want to iterate over all objects of a given type.
1032 *
1033 * An earlier way to handle driver private state was by subclassing struct
1034 * &drm_atomic_state. But since that encourages non-standard ways to implement
1035 * the check/commit split atomic requires (by using e.g. "check and rollback or
1036 * commit instead" of "duplicate state, check, then either commit or release
1037 * duplicated state) it is deprecated in favour of using &drm_private_state.
1038 */
1039
1040/**
1041 * drm_atomic_private_obj_init - initialize private object
1042 * @obj: private object
1043 * @state: initial private object state
1044 * @funcs: pointer to the struct of function pointers that identify the object
1045 * type
1046 *
1047 * Initialize the private object, which can be embedded into any
1048 * driver private object that needs its own atomic state.
1049 */
1050void
1051drm_atomic_private_obj_init(struct drm_private_obj *obj,
1052 struct drm_private_state *state,
1053 const struct drm_private_state_funcs *funcs)
1054{
1055 memset(obj, 0, sizeof(*obj));
1056
1057 obj->state = state;
1058 obj->funcs = funcs;
1059}
1060EXPORT_SYMBOL(drm_atomic_private_obj_init);
1061
1062/**
1063 * drm_atomic_private_obj_fini - finalize private object
1064 * @obj: private object
1065 *
1066 * Finalize the private object.
1067 */
1068void
1069drm_atomic_private_obj_fini(struct drm_private_obj *obj)
1070{
1071 obj->funcs->atomic_destroy_state(obj, obj->state);
1072}
1073EXPORT_SYMBOL(drm_atomic_private_obj_fini);
1074
1075/**
1076 * drm_atomic_get_private_obj_state - get private object state
1077 * @state: global atomic state
1078 * @obj: private object to get the state for
1079 *
1080 * This function returns the private object state for the given private object,
1081 * allocating the state if needed. It does not grab any locks as the caller is
1082 * expected to care of any required locking.
1083 *
1084 * RETURNS:
1085 *
1086 * Either the allocated state or the error code encoded into a pointer.
1087 */
1088struct drm_private_state *
1089drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
1090 struct drm_private_obj *obj)
1091{
1092 int index, num_objs, i;
1093 size_t size;
1094 struct __drm_private_objs_state *arr;
1095 struct drm_private_state *obj_state;
1096
1097 for (i = 0; i < state->num_private_objs; i++)
1098 if (obj == state->private_objs[i].ptr)
1099 return state->private_objs[i].state;
1100
1101 num_objs = state->num_private_objs + 1;
1102 size = sizeof(*state->private_objs) * num_objs;
1103 arr = krealloc(state->private_objs, size, GFP_KERNEL);
1104 if (!arr)
1105 return ERR_PTR(-ENOMEM);
1106
1107 state->private_objs = arr;
1108 index = state->num_private_objs;
1109 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
1110
1111 obj_state = obj->funcs->atomic_duplicate_state(obj);
1112 if (!obj_state)
1113 return ERR_PTR(-ENOMEM);
1114
1115 state->private_objs[index].state = obj_state;
1116 state->private_objs[index].old_state = obj->state;
1117 state->private_objs[index].new_state = obj_state;
1118 state->private_objs[index].ptr = obj;
1119
1120 state->num_private_objs = num_objs;
1121
1122 DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n",
1123 obj, obj_state, state);
1124
1125 return obj_state;
1126}
1127EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
1128
1129/**
1130 * drm_atomic_get_connector_state - get connector state
1131 * @state: global atomic state object
1132 * @connector: connector to get state object for
1133 *
1134 * This function returns the connector state for the given connector,
1135 * allocating it if needed. It will also grab the relevant connector lock to
1136 * make sure that the state is consistent.
1137 *
1138 * Returns:
1139 *
1140 * Either the allocated state or the error code encoded into the pointer. When
1141 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1142 * entire atomic sequence must be restarted. All other errors are fatal.
1143 */
1144struct drm_connector_state *
1145drm_atomic_get_connector_state(struct drm_atomic_state *state,
1146 struct drm_connector *connector)
1147{
1148 int ret, index;
1149 struct drm_mode_config *config = &connector->dev->mode_config;
1150 struct drm_connector_state *connector_state;
1151
1152 WARN_ON(!state->acquire_ctx);
1153
1154 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1155 if (ret)
1156 return ERR_PTR(ret);
1157
1158 index = drm_connector_index(connector);
1159
1160 if (index >= state->num_connector) {
1161 struct __drm_connnectors_state *c;
1162 int alloc = max(index + 1, config->num_connector);
1163
1164 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
1165 if (!c)
1166 return ERR_PTR(-ENOMEM);
1167
1168 state->connectors = c;
1169 memset(&state->connectors[state->num_connector], 0,
1170 sizeof(*state->connectors) * (alloc - state->num_connector));
1171
1172 state->num_connector = alloc;
1173 }
1174
1175 if (state->connectors[index].state)
1176 return state->connectors[index].state;
1177
1178 connector_state = connector->funcs->atomic_duplicate_state(connector);
1179 if (!connector_state)
1180 return ERR_PTR(-ENOMEM);
1181
1182 drm_connector_get(connector);
1183 state->connectors[index].state = connector_state;
1184 state->connectors[index].old_state = connector->state;
1185 state->connectors[index].new_state = connector_state;
1186 state->connectors[index].ptr = connector;
1187 connector_state->state = state;
1188
1189 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n",
1190 connector->base.id, connector->name,
1191 connector_state, state);
1192
1193 if (connector_state->crtc) {
1194 struct drm_crtc_state *crtc_state;
1195
1196 crtc_state = drm_atomic_get_crtc_state(state,
1197 connector_state->crtc);
1198 if (IS_ERR(crtc_state))
1199 return ERR_CAST(crtc_state);
1200 }
1201
1202 return connector_state;
1203}
1204EXPORT_SYMBOL(drm_atomic_get_connector_state);
1205
1206/**
1207 * drm_atomic_connector_set_property - set property on connector.
1208 * @connector: the drm connector to set a property on
1209 * @state: the state object to update with the new property value
1210 * @property: the property to set
1211 * @val: the new property value
1212 *
1213 * This function handles generic/core properties and calls out to driver's
1214 * &drm_connector_funcs.atomic_set_property for driver properties. To ensure
1215 * consistent behavior you must call this function rather than the driver hook
1216 * directly.
1217 *
1218 * RETURNS:
1219 * Zero on success, error code on failure
1220 */
1221static int drm_atomic_connector_set_property(struct drm_connector *connector,
1222 struct drm_connector_state *state, struct drm_property *property,
1223 uint64_t val)
1224{
1225 struct drm_device *dev = connector->dev;
1226 struct drm_mode_config *config = &dev->mode_config;
1227
1228 if (property == config->prop_crtc_id) {
1229 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
1230 return drm_atomic_set_crtc_for_connector(state, crtc);
1231 } else if (property == config->dpms_property) {
1232 /* setting DPMS property requires special handling, which
1233 * is done in legacy setprop path for us. Disallow (for
1234 * now?) atomic writes to DPMS property:
1235 */
1236 return -EINVAL;
1237 } else if (property == config->tv_select_subconnector_property) {
1238 state->tv.subconnector = val;
1239 } else if (property == config->tv_left_margin_property) {
1240 state->tv.margins.left = val;
1241 } else if (property == config->tv_right_margin_property) {
1242 state->tv.margins.right = val;
1243 } else if (property == config->tv_top_margin_property) {
1244 state->tv.margins.top = val;
1245 } else if (property == config->tv_bottom_margin_property) {
1246 state->tv.margins.bottom = val;
1247 } else if (property == config->tv_mode_property) {
1248 state->tv.mode = val;
1249 } else if (property == config->tv_brightness_property) {
1250 state->tv.brightness = val;
1251 } else if (property == config->tv_contrast_property) {
1252 state->tv.contrast = val;
1253 } else if (property == config->tv_flicker_reduction_property) {
1254 state->tv.flicker_reduction = val;
1255 } else if (property == config->tv_overscan_property) {
1256 state->tv.overscan = val;
1257 } else if (property == config->tv_saturation_property) {
1258 state->tv.saturation = val;
1259 } else if (property == config->tv_hue_property) {
1260 state->tv.hue = val;
1261 } else if (property == config->link_status_property) {
1262 /* Never downgrade from GOOD to BAD on userspace's request here,
1263 * only hw issues can do that.
1264 *
1265 * For an atomic property the userspace doesn't need to be able
1266 * to understand all the properties, but needs to be able to
1267 * restore the state it wants on VT switch. So if the userspace
1268 * tries to change the link_status from GOOD to BAD, driver
1269 * silently rejects it and returns a 0. This prevents userspace
1270 * from accidently breaking the display when it restores the
1271 * state.
1272 */
1273 if (state->link_status != DRM_LINK_STATUS_GOOD)
1274 state->link_status = val;
1275 } else if (property == config->aspect_ratio_property) {
1276 state->picture_aspect_ratio = val;
1277 } else if (property == connector->scaling_mode_property) {
1278 state->scaling_mode = val;
1279 } else if (property == connector->content_protection_property) {
1280 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
1281 DRM_DEBUG_KMS("only drivers can set CP Enabled\n");
1282 return -EINVAL;
1283 }
1284 state->content_protection = val;
1285 } else if (connector->funcs->atomic_set_property) {
1286 return connector->funcs->atomic_set_property(connector,
1287 state, property, val);
1288 } else {
1289 return -EINVAL;
1290 }
1291
1292 return 0;
1293}
1294
1295static void drm_atomic_connector_print_state(struct drm_printer *p,
1296 const struct drm_connector_state *state)
1297{
1298 struct drm_connector *connector = state->connector;
1299
1300 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1301 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1302
1303 if (connector->funcs->atomic_print_state)
1304 connector->funcs->atomic_print_state(p, state);
1305}
1306
1307/**
1308 * drm_atomic_connector_get_property - get property value from connector state
1309 * @connector: the drm connector to set a property on
1310 * @state: the state object to get the property value from
1311 * @property: the property to set
1312 * @val: return location for the property value
1313 *
1314 * This function handles generic/core properties and calls out to driver's
1315 * &drm_connector_funcs.atomic_get_property for driver properties. To ensure
1316 * consistent behavior you must call this function rather than the driver hook
1317 * directly.
1318 *
1319 * RETURNS:
1320 * Zero on success, error code on failure
1321 */
1322static int
1323drm_atomic_connector_get_property(struct drm_connector *connector,
1324 const struct drm_connector_state *state,
1325 struct drm_property *property, uint64_t *val)
1326{
1327 struct drm_device *dev = connector->dev;
1328 struct drm_mode_config *config = &dev->mode_config;
1329
1330 if (property == config->prop_crtc_id) {
1331 *val = (state->crtc) ? state->crtc->base.id : 0;
1332 } else if (property == config->dpms_property) {
1333 *val = connector->dpms;
1334 } else if (property == config->tv_select_subconnector_property) {
1335 *val = state->tv.subconnector;
1336 } else if (property == config->tv_left_margin_property) {
1337 *val = state->tv.margins.left;
1338 } else if (property == config->tv_right_margin_property) {
1339 *val = state->tv.margins.right;
1340 } else if (property == config->tv_top_margin_property) {
1341 *val = state->tv.margins.top;
1342 } else if (property == config->tv_bottom_margin_property) {
1343 *val = state->tv.margins.bottom;
1344 } else if (property == config->tv_mode_property) {
1345 *val = state->tv.mode;
1346 } else if (property == config->tv_brightness_property) {
1347 *val = state->tv.brightness;
1348 } else if (property == config->tv_contrast_property) {
1349 *val = state->tv.contrast;
1350 } else if (property == config->tv_flicker_reduction_property) {
1351 *val = state->tv.flicker_reduction;
1352 } else if (property == config->tv_overscan_property) {
1353 *val = state->tv.overscan;
1354 } else if (property == config->tv_saturation_property) {
1355 *val = state->tv.saturation;
1356 } else if (property == config->tv_hue_property) {
1357 *val = state->tv.hue;
1358 } else if (property == config->link_status_property) {
1359 *val = state->link_status;
1360 } else if (property == config->aspect_ratio_property) {
1361 *val = state->picture_aspect_ratio;
1362 } else if (property == connector->scaling_mode_property) {
1363 *val = state->scaling_mode;
1364 } else if (property == connector->content_protection_property) {
1365 *val = state->content_protection;
1366 } else if (connector->funcs->atomic_get_property) {
1367 return connector->funcs->atomic_get_property(connector,
1368 state, property, val);
1369 } else {
1370 return -EINVAL;
1371 }
1372
1373 return 0;
1374}
1375
1376int drm_atomic_get_property(struct drm_mode_object *obj,
1377 struct drm_property *property, uint64_t *val)
1378{
1379 struct drm_device *dev = property->dev;
1380 int ret;
1381
1382 switch (obj->type) {
1383 case DRM_MODE_OBJECT_CONNECTOR: {
1384 struct drm_connector *connector = obj_to_connector(obj);
1385 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
1386 ret = drm_atomic_connector_get_property(connector,
1387 connector->state, property, val);
1388 break;
1389 }
1390 case DRM_MODE_OBJECT_CRTC: {
1391 struct drm_crtc *crtc = obj_to_crtc(obj);
1392 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
1393 ret = drm_atomic_crtc_get_property(crtc,
1394 crtc->state, property, val);
1395 break;
1396 }
1397 case DRM_MODE_OBJECT_PLANE: {
1398 struct drm_plane *plane = obj_to_plane(obj);
1399 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
1400 ret = drm_atomic_plane_get_property(plane,
1401 plane->state, property, val);
1402 break;
1403 }
1404 default:
1405 ret = -EINVAL;
1406 break;
1407 }
1408
1409 return ret;
1410}
1411
1412/**
1413 * drm_atomic_set_crtc_for_plane - set crtc for plane
1414 * @plane_state: the plane whose incoming state to update
1415 * @crtc: crtc to use for the plane
1416 *
1417 * Changing the assigned crtc for a plane requires us to grab the lock and state
1418 * for the new crtc, as needed. This function takes care of all these details
1419 * besides updating the pointer in the state object itself.
1420 *
1421 * Returns:
1422 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1423 * then the w/w mutex code has detected a deadlock and the entire atomic
1424 * sequence must be restarted. All other errors are fatal.
1425 */
1426int
1427drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
1428 struct drm_crtc *crtc)
1429{
1430 struct drm_plane *plane = plane_state->plane;
1431 struct drm_crtc_state *crtc_state;
1432
1433 if (plane_state->crtc) {
1434 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1435 plane_state->crtc);
1436 if (WARN_ON(IS_ERR(crtc_state)))
1437 return PTR_ERR(crtc_state);
1438
1439 crtc_state->plane_mask &= ~(1 << drm_plane_index(plane));
1440 }
1441
1442 plane_state->crtc = crtc;
1443
1444 if (crtc) {
1445 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1446 crtc);
1447 if (IS_ERR(crtc_state))
1448 return PTR_ERR(crtc_state);
1449 crtc_state->plane_mask |= (1 << drm_plane_index(plane));
1450 }
1451
1452 if (crtc)
1453 DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d:%s]\n",
1454 plane_state, crtc->base.id, crtc->name);
1455 else
1456 DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n",
1457 plane_state);
1458
1459 return 0;
1460}
1461EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
1462
1463/**
1464 * drm_atomic_set_fb_for_plane - set framebuffer for plane
1465 * @plane_state: atomic state object for the plane
1466 * @fb: fb to use for the plane
1467 *
1468 * Changing the assigned framebuffer for a plane requires us to grab a reference
1469 * to the new fb and drop the reference to the old fb, if there is one. This
1470 * function takes care of all these details besides updating the pointer in the
1471 * state object itself.
1472 */
1473void
1474drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
1475 struct drm_framebuffer *fb)
1476{
1477 if (fb)
1478 DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n",
1479 fb->base.id, plane_state);
1480 else
1481 DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n",
1482 plane_state);
1483
1484 drm_framebuffer_assign(&plane_state->fb, fb);
1485}
1486EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
1487
1488/**
1489 * drm_atomic_set_fence_for_plane - set fence for plane
1490 * @plane_state: atomic state object for the plane
1491 * @fence: dma_fence to use for the plane
1492 *
1493 * Helper to setup the plane_state fence in case it is not set yet.
1494 * By using this drivers doesn't need to worry if the user choose
1495 * implicit or explicit fencing.
1496 *
1497 * This function will not set the fence to the state if it was set
1498 * via explicit fencing interfaces on the atomic ioctl. In that case it will
1499 * drop the reference to the fence as we are not storing it anywhere.
1500 * Otherwise, if &drm_plane_state.fence is not set this function we just set it
1501 * with the received implicit fence. In both cases this function consumes a
1502 * reference for @fence.
1503 */
1504void
1505drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
1506 struct dma_fence *fence)
1507{
1508 if (plane_state->fence) {
1509 dma_fence_put(fence);
1510 return;
1511 }
1512
1513 plane_state->fence = fence;
1514}
1515EXPORT_SYMBOL(drm_atomic_set_fence_for_plane);
1516
1517/**
1518 * drm_atomic_set_crtc_for_connector - set crtc for connector
1519 * @conn_state: atomic state object for the connector
1520 * @crtc: crtc to use for the connector
1521 *
1522 * Changing the assigned crtc for a connector requires us to grab the lock and
1523 * state for the new crtc, as needed. This function takes care of all these
1524 * details besides updating the pointer in the state object itself.
1525 *
1526 * Returns:
1527 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1528 * then the w/w mutex code has detected a deadlock and the entire atomic
1529 * sequence must be restarted. All other errors are fatal.
1530 */
1531int
1532drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
1533 struct drm_crtc *crtc)
1534{
1535 struct drm_crtc_state *crtc_state;
1536
1537 if (conn_state->crtc == crtc)
1538 return 0;
1539
1540 if (conn_state->crtc) {
1541 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
1542 conn_state->crtc);
1543
1544 crtc_state->connector_mask &=
1545 ~(1 << drm_connector_index(conn_state->connector));
1546
1547 drm_connector_put(conn_state->connector);
1548 conn_state->crtc = NULL;
1549 }
1550
1551 if (crtc) {
1552 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
1553 if (IS_ERR(crtc_state))
1554 return PTR_ERR(crtc_state);
1555
1556 crtc_state->connector_mask |=
1557 1 << drm_connector_index(conn_state->connector);
1558
1559 drm_connector_get(conn_state->connector);
1560 conn_state->crtc = crtc;
1561
1562 DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d:%s]\n",
1563 conn_state, crtc->base.id, crtc->name);
1564 } else {
1565 DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n",
1566 conn_state);
1567 }
1568
1569 return 0;
1570}
1571EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
1572
1573/**
1574 * drm_atomic_add_affected_connectors - add connectors for crtc
1575 * @state: atomic state
1576 * @crtc: DRM crtc
1577 *
1578 * This function walks the current configuration and adds all connectors
1579 * currently using @crtc to the atomic configuration @state. Note that this
1580 * function must acquire the connection mutex. This can potentially cause
1581 * unneeded seralization if the update is just for the planes on one crtc. Hence
1582 * drivers and helpers should only call this when really needed (e.g. when a
1583 * full modeset needs to happen due to some change).
1584 *
1585 * Returns:
1586 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1587 * then the w/w mutex code has detected a deadlock and the entire atomic
1588 * sequence must be restarted. All other errors are fatal.
1589 */
1590int
1591drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1592 struct drm_crtc *crtc)
1593{
1594 struct drm_mode_config *config = &state->dev->mode_config;
1595 struct drm_connector *connector;
1596 struct drm_connector_state *conn_state;
1597 struct drm_connector_list_iter conn_iter;
1598 struct drm_crtc_state *crtc_state;
1599 int ret;
1600
1601 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1602 if (IS_ERR(crtc_state))
1603 return PTR_ERR(crtc_state);
1604
1605 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1606 if (ret)
1607 return ret;
1608
1609 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1610 crtc->base.id, crtc->name, state);
1611
1612 /*
1613 * Changed connectors are already in @state, so only need to look
1614 * at the connector_mask in crtc_state.
1615 */
1616 drm_connector_list_iter_begin(state->dev, &conn_iter);
1617 drm_for_each_connector_iter(connector, &conn_iter) {
1618 if (!(crtc_state->connector_mask & (1 << drm_connector_index(connector))))
1619 continue;
1620
1621 conn_state = drm_atomic_get_connector_state(state, connector);
1622 if (IS_ERR(conn_state)) {
1623 drm_connector_list_iter_end(&conn_iter);
1624 return PTR_ERR(conn_state);
1625 }
1626 }
1627 drm_connector_list_iter_end(&conn_iter);
1628
1629 return 0;
1630}
1631EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1632
1633/**
1634 * drm_atomic_add_affected_planes - add planes for crtc
1635 * @state: atomic state
1636 * @crtc: DRM crtc
1637 *
1638 * This function walks the current configuration and adds all planes
1639 * currently used by @crtc to the atomic configuration @state. This is useful
1640 * when an atomic commit also needs to check all currently enabled plane on
1641 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1642 * to avoid special code to force-enable all planes.
1643 *
1644 * Since acquiring a plane state will always also acquire the w/w mutex of the
1645 * current CRTC for that plane (if there is any) adding all the plane states for
1646 * a CRTC will not reduce parallism of atomic updates.
1647 *
1648 * Returns:
1649 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1650 * then the w/w mutex code has detected a deadlock and the entire atomic
1651 * sequence must be restarted. All other errors are fatal.
1652 */
1653int
1654drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1655 struct drm_crtc *crtc)
1656{
1657 struct drm_plane *plane;
1658
1659 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1660
1661 drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) {
1662 struct drm_plane_state *plane_state =
1663 drm_atomic_get_plane_state(state, plane);
1664
1665 if (IS_ERR(plane_state))
1666 return PTR_ERR(plane_state);
1667 }
1668 return 0;
1669}
1670EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1671
1672/**
1673 * drm_atomic_check_only - check whether a given config would work
1674 * @state: atomic configuration to check
1675 *
1676 * Note that this function can return -EDEADLK if the driver needed to acquire
1677 * more locks but encountered a deadlock. The caller must then do the usual w/w
1678 * backoff dance and restart. All other errors are fatal.
1679 *
1680 * Returns:
1681 * 0 on success, negative error code on failure.
1682 */
1683int drm_atomic_check_only(struct drm_atomic_state *state)
1684{
1685 struct drm_device *dev = state->dev;
1686 struct drm_mode_config *config = &dev->mode_config;
1687 struct drm_plane *plane;
1688 struct drm_plane_state *plane_state;
1689 struct drm_crtc *crtc;
1690 struct drm_crtc_state *crtc_state;
1691 int i, ret = 0;
1692
1693 DRM_DEBUG_ATOMIC("checking %p\n", state);
1694
1695 for_each_new_plane_in_state(state, plane, plane_state, i) {
1696 ret = drm_atomic_plane_check(plane, plane_state);
1697 if (ret) {
1698 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1699 plane->base.id, plane->name);
1700 return ret;
1701 }
1702 }
1703
1704 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1705 ret = drm_atomic_crtc_check(crtc, crtc_state);
1706 if (ret) {
1707 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1708 crtc->base.id, crtc->name);
1709 return ret;
1710 }
1711 }
1712
1713 if (config->funcs->atomic_check)
1714 ret = config->funcs->atomic_check(state->dev, state);
1715
1716 if (ret)
1717 return ret;
1718
1719 if (!state->allow_modeset) {
1720 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1721 if (drm_atomic_crtc_needs_modeset(crtc_state)) {
1722 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1723 crtc->base.id, crtc->name);
1724 return -EINVAL;
1725 }
1726 }
1727 }
1728
1729 return 0;
1730}
1731EXPORT_SYMBOL(drm_atomic_check_only);
1732
1733/**
1734 * drm_atomic_commit - commit configuration atomically
1735 * @state: atomic configuration to check
1736 *
1737 * Note that this function can return -EDEADLK if the driver needed to acquire
1738 * more locks but encountered a deadlock. The caller must then do the usual w/w
1739 * backoff dance and restart. All other errors are fatal.
1740 *
1741 * This function will take its own reference on @state.
1742 * Callers should always release their reference with drm_atomic_state_put().
1743 *
1744 * Returns:
1745 * 0 on success, negative error code on failure.
1746 */
1747int drm_atomic_commit(struct drm_atomic_state *state)
1748{
1749 struct drm_mode_config *config = &state->dev->mode_config;
1750 int ret;
1751
1752 ret = drm_atomic_check_only(state);
1753 if (ret)
1754 return ret;
1755
1756 DRM_DEBUG_ATOMIC("committing %p\n", state);
1757
1758 return config->funcs->atomic_commit(state->dev, state, false);
1759}
1760EXPORT_SYMBOL(drm_atomic_commit);
1761
1762/**
1763 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1764 * @state: atomic configuration to check
1765 *
1766 * Note that this function can return -EDEADLK if the driver needed to acquire
1767 * more locks but encountered a deadlock. The caller must then do the usual w/w
1768 * backoff dance and restart. All other errors are fatal.
1769 *
1770 * This function will take its own reference on @state.
1771 * Callers should always release their reference with drm_atomic_state_put().
1772 *
1773 * Returns:
1774 * 0 on success, negative error code on failure.
1775 */
1776int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1777{
1778 struct drm_mode_config *config = &state->dev->mode_config;
1779 int ret;
1780
1781 ret = drm_atomic_check_only(state);
1782 if (ret)
1783 return ret;
1784
1785 DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state);
1786
1787 return config->funcs->atomic_commit(state->dev, state, true);
1788}
1789EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1790
1791static void drm_atomic_print_state(const struct drm_atomic_state *state)
1792{
1793 struct drm_printer p = drm_info_printer(state->dev->dev);
1794 struct drm_plane *plane;
1795 struct drm_plane_state *plane_state;
1796 struct drm_crtc *crtc;
1797 struct drm_crtc_state *crtc_state;
1798 struct drm_connector *connector;
1799 struct drm_connector_state *connector_state;
1800 int i;
1801
1802 DRM_DEBUG_ATOMIC("checking %p\n", state);
1803
1804 for_each_new_plane_in_state(state, plane, plane_state, i)
1805 drm_atomic_plane_print_state(&p, plane_state);
1806
1807 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1808 drm_atomic_crtc_print_state(&p, crtc_state);
1809
1810 for_each_new_connector_in_state(state, connector, connector_state, i)
1811 drm_atomic_connector_print_state(&p, connector_state);
1812}
1813
1814static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1815 bool take_locks)
1816{
1817 struct drm_mode_config *config = &dev->mode_config;
1818 struct drm_plane *plane;
1819 struct drm_crtc *crtc;
1820 struct drm_connector *connector;
1821 struct drm_connector_list_iter conn_iter;
1822
1823 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1824 return;
1825
1826 list_for_each_entry(plane, &config->plane_list, head) {
1827 if (take_locks)
1828 drm_modeset_lock(&plane->mutex, NULL);
1829 drm_atomic_plane_print_state(p, plane->state);
1830 if (take_locks)
1831 drm_modeset_unlock(&plane->mutex);
1832 }
1833
1834 list_for_each_entry(crtc, &config->crtc_list, head) {
1835 if (take_locks)
1836 drm_modeset_lock(&crtc->mutex, NULL);
1837 drm_atomic_crtc_print_state(p, crtc->state);
1838 if (take_locks)
1839 drm_modeset_unlock(&crtc->mutex);
1840 }
1841
1842 drm_connector_list_iter_begin(dev, &conn_iter);
1843 if (take_locks)
1844 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1845 drm_for_each_connector_iter(connector, &conn_iter)
1846 drm_atomic_connector_print_state(p, connector->state);
1847 if (take_locks)
1848 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1849 drm_connector_list_iter_end(&conn_iter);
1850}
1851
1852/**
1853 * drm_state_dump - dump entire device atomic state
1854 * @dev: the drm device
1855 * @p: where to print the state to
1856 *
1857 * Just for debugging. Drivers might want an option to dump state
1858 * to dmesg in case of error irq's. (Hint, you probably want to
1859 * ratelimit this!)
1860 *
1861 * The caller must drm_modeset_lock_all(), or if this is called
1862 * from error irq handler, it should not be enabled by default.
1863 * (Ie. if you are debugging errors you might not care that this
1864 * is racey. But calling this without all modeset locks held is
1865 * not inherently safe.)
1866 */
1867void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1868{
1869 __drm_state_dump(dev, p, false);
1870}
1871EXPORT_SYMBOL(drm_state_dump);
1872
1873#ifdef CONFIG_DEBUG_FS
1874static int drm_state_info(struct seq_file *m, void *data)
1875{
1876 struct drm_info_node *node = (struct drm_info_node *) m->private;
1877 struct drm_device *dev = node->minor->dev;
1878 struct drm_printer p = drm_seq_file_printer(m);
1879
1880 __drm_state_dump(dev, &p, true);
1881
1882 return 0;
1883}
1884
1885/* any use in debugfs files to dump individual planes/crtc/etc? */
1886static const struct drm_info_list drm_atomic_debugfs_list[] = {
1887 {"state", drm_state_info, 0},
1888};
1889
1890int drm_atomic_debugfs_init(struct drm_minor *minor)
1891{
1892 return drm_debugfs_create_files(drm_atomic_debugfs_list,
1893 ARRAY_SIZE(drm_atomic_debugfs_list),
1894 minor->debugfs_root, minor);
1895}
1896#endif
1897
1898/*
1899 * The big monster ioctl
1900 */
1901
1902static struct drm_pending_vblank_event *create_vblank_event(
1903 struct drm_crtc *crtc, uint64_t user_data)
1904{
1905 struct drm_pending_vblank_event *e = NULL;
1906
1907 e = kzalloc(sizeof *e, GFP_KERNEL);
1908 if (!e)
1909 return NULL;
1910
1911 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1912 e->event.base.length = sizeof(e->event);
1913 e->event.vbl.crtc_id = crtc->base.id;
1914 e->event.vbl.user_data = user_data;
1915
1916 return e;
1917}
1918
1919int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,
1920 struct drm_connector *connector,
1921 int mode)
1922{
1923 struct drm_connector *tmp_connector;
1924 struct drm_connector_state *new_conn_state;
1925 struct drm_crtc *crtc;
1926 struct drm_crtc_state *crtc_state;
1927 int i, ret, old_mode = connector->dpms;
1928 bool active = false;
1929
1930 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,
1931 state->acquire_ctx);
1932 if (ret)
1933 return ret;
1934
1935 if (mode != DRM_MODE_DPMS_ON)
1936 mode = DRM_MODE_DPMS_OFF;
1937 connector->dpms = mode;
1938
1939 crtc = connector->state->crtc;
1940 if (!crtc)
1941 goto out;
1942 ret = drm_atomic_add_affected_connectors(state, crtc);
1943 if (ret)
1944 goto out;
1945
1946 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1947 if (IS_ERR(crtc_state)) {
1948 ret = PTR_ERR(crtc_state);
1949 goto out;
1950 }
1951
1952 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) {
1953 if (new_conn_state->crtc != crtc)
1954 continue;
1955 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
1956 active = true;
1957 break;
1958 }
1959 }
1960
1961 crtc_state->active = active;
1962 ret = drm_atomic_commit(state);
1963out:
1964 if (ret != 0)
1965 connector->dpms = old_mode;
1966 return ret;
1967}
1968
1969int drm_atomic_set_property(struct drm_atomic_state *state,
1970 struct drm_mode_object *obj,
1971 struct drm_property *prop,
1972 uint64_t prop_value)
1973{
1974 struct drm_mode_object *ref;
1975 int ret;
1976
1977 if (!drm_property_change_valid_get(prop, prop_value, &ref))
1978 return -EINVAL;
1979
1980 switch (obj->type) {
1981 case DRM_MODE_OBJECT_CONNECTOR: {
1982 struct drm_connector *connector = obj_to_connector(obj);
1983 struct drm_connector_state *connector_state;
1984
1985 connector_state = drm_atomic_get_connector_state(state, connector);
1986 if (IS_ERR(connector_state)) {
1987 ret = PTR_ERR(connector_state);
1988 break;
1989 }
1990
1991 ret = drm_atomic_connector_set_property(connector,
1992 connector_state, prop, prop_value);
1993 break;
1994 }
1995 case DRM_MODE_OBJECT_CRTC: {
1996 struct drm_crtc *crtc = obj_to_crtc(obj);
1997 struct drm_crtc_state *crtc_state;
1998
1999 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2000 if (IS_ERR(crtc_state)) {
2001 ret = PTR_ERR(crtc_state);
2002 break;
2003 }
2004
2005 ret = drm_atomic_crtc_set_property(crtc,
2006 crtc_state, prop, prop_value);
2007 break;
2008 }
2009 case DRM_MODE_OBJECT_PLANE: {
2010 struct drm_plane *plane = obj_to_plane(obj);
2011 struct drm_plane_state *plane_state;
2012
2013 plane_state = drm_atomic_get_plane_state(state, plane);
2014 if (IS_ERR(plane_state)) {
2015 ret = PTR_ERR(plane_state);
2016 break;
2017 }
2018
2019 ret = drm_atomic_plane_set_property(plane,
2020 plane_state, prop, prop_value);
2021 break;
2022 }
2023 default:
2024 ret = -EINVAL;
2025 break;
2026 }
2027
2028 drm_property_change_valid_put(prop, ref);
2029 return ret;
2030}
2031
2032/**
2033 * drm_atomic_clean_old_fb -- Unset old_fb pointers and set plane->fb pointers.
2034 *
2035 * @dev: drm device to check.
2036 * @plane_mask: plane mask for planes that were updated.
2037 * @ret: return value, can be -EDEADLK for a retry.
2038 *
2039 * Before doing an update &drm_plane.old_fb is set to &drm_plane.fb, but before
2040 * dropping the locks old_fb needs to be set to NULL and plane->fb updated. This
2041 * is a common operation for each atomic update, so this call is split off as a
2042 * helper.
2043 */
2044void drm_atomic_clean_old_fb(struct drm_device *dev,
2045 unsigned plane_mask,
2046 int ret)
2047{
2048 struct drm_plane *plane;
2049
2050 /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping
2051 * locks (ie. while it is still safe to deref plane->state). We
2052 * need to do this here because the driver entry points cannot
2053 * distinguish between legacy and atomic ioctls.
2054 */
2055 drm_for_each_plane_mask(plane, dev, plane_mask) {
2056 if (ret == 0) {
2057 struct drm_framebuffer *new_fb = plane->state->fb;
2058 if (new_fb)
2059 drm_framebuffer_get(new_fb);
2060 plane->fb = new_fb;
2061 plane->crtc = plane->state->crtc;
2062
2063 if (plane->old_fb)
2064 drm_framebuffer_put(plane->old_fb);
2065 }
2066 plane->old_fb = NULL;
2067 }
2068}
2069EXPORT_SYMBOL(drm_atomic_clean_old_fb);
2070
2071/**
2072 * DOC: explicit fencing properties
2073 *
2074 * Explicit fencing allows userspace to control the buffer synchronization
2075 * between devices. A Fence or a group of fences are transfered to/from
2076 * userspace using Sync File fds and there are two DRM properties for that.
2077 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and
2078 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel.
2079 *
2080 * As a contrast, with implicit fencing the kernel keeps track of any
2081 * ongoing rendering, and automatically ensures that the atomic update waits
2082 * for any pending rendering to complete. For shared buffers represented with
2083 * a &struct dma_buf this is tracked in &struct reservation_object.
2084 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org),
2085 * whereas explicit fencing is what Android wants.
2086 *
2087 * "IN_FENCE_FD”:
2088 * Use this property to pass a fence that DRM should wait on before
2089 * proceeding with the Atomic Commit request and show the framebuffer for
2090 * the plane on the screen. The fence can be either a normal fence or a
2091 * merged one, the sync_file framework will handle both cases and use a
2092 * fence_array if a merged fence is received. Passing -1 here means no
2093 * fences to wait on.
2094 *
2095 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag
2096 * it will only check if the Sync File is a valid one.
2097 *
2098 * On the driver side the fence is stored on the @fence parameter of
2099 * &struct drm_plane_state. Drivers which also support implicit fencing
2100 * should set the implicit fence using drm_atomic_set_fence_for_plane(),
2101 * to make sure there's consistent behaviour between drivers in precedence
2102 * of implicit vs. explicit fencing.
2103 *
2104 * "OUT_FENCE_PTR”:
2105 * Use this property to pass a file descriptor pointer to DRM. Once the
2106 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with
2107 * the file descriptor number of a Sync File. This Sync File contains the
2108 * CRTC fence that will be signaled when all framebuffers present on the
2109 * Atomic Commit * request for that given CRTC are scanned out on the
2110 * screen.
2111 *
2112 * The Atomic Commit request fails if a invalid pointer is passed. If the
2113 * Atomic Commit request fails for any other reason the out fence fd
2114 * returned will be -1. On a Atomic Commit with the
2115 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1.
2116 *
2117 * Note that out-fences don't have a special interface to drivers and are
2118 * internally represented by a &struct drm_pending_vblank_event in struct
2119 * &drm_crtc_state, which is also used by the nonblocking atomic commit
2120 * helpers and for the DRM event handling for existing userspace.
2121 */
2122
2123struct drm_out_fence_state {
2124 s32 __user *out_fence_ptr;
2125 struct sync_file *sync_file;
2126 int fd;
2127};
2128
2129static int setup_out_fence(struct drm_out_fence_state *fence_state,
2130 struct dma_fence *fence)
2131{
2132 fence_state->fd = get_unused_fd_flags(O_CLOEXEC);
2133 if (fence_state->fd < 0)
2134 return fence_state->fd;
2135
2136 if (put_user(fence_state->fd, fence_state->out_fence_ptr))
2137 return -EFAULT;
2138
2139 fence_state->sync_file = sync_file_create(fence);
2140 if (!fence_state->sync_file)
2141 return -ENOMEM;
2142
2143 return 0;
2144}
2145
2146static int prepare_crtc_signaling(struct drm_device *dev,
2147 struct drm_atomic_state *state,
2148 struct drm_mode_atomic *arg,
2149 struct drm_file *file_priv,
2150 struct drm_out_fence_state **fence_state,
2151 unsigned int *num_fences)
2152{
2153 struct drm_crtc *crtc;
2154 struct drm_crtc_state *crtc_state;
2155 int i, c = 0, ret;
2156
2157 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
2158 return 0;
2159
2160 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
2161 s32 __user *fence_ptr;
2162
2163 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);
2164
2165 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {
2166 struct drm_pending_vblank_event *e;
2167
2168 e = create_vblank_event(crtc, arg->user_data);
2169 if (!e)
2170 return -ENOMEM;
2171
2172 crtc_state->event = e;
2173 }
2174
2175 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
2176 struct drm_pending_vblank_event *e = crtc_state->event;
2177
2178 if (!file_priv)
2179 continue;
2180
2181 ret = drm_event_reserve_init(dev, file_priv, &e->base,
2182 &e->event.base);
2183 if (ret) {
2184 kfree(e);
2185 crtc_state->event = NULL;
2186 return ret;
2187 }
2188 }
2189
2190 if (fence_ptr) {
2191 struct dma_fence *fence;
2192 struct drm_out_fence_state *f;
2193
2194 f = krealloc(*fence_state, sizeof(**fence_state) *
2195 (*num_fences + 1), GFP_KERNEL);
2196 if (!f)
2197 return -ENOMEM;
2198
2199 memset(&f[*num_fences], 0, sizeof(*f));
2200
2201 f[*num_fences].out_fence_ptr = fence_ptr;
2202 *fence_state = f;
2203
2204 fence = drm_crtc_create_fence(crtc);
2205 if (!fence)
2206 return -ENOMEM;
2207
2208 ret = setup_out_fence(&f[(*num_fences)++], fence);
2209 if (ret) {
2210 dma_fence_put(fence);
2211 return ret;
2212 }
2213
2214 crtc_state->event->base.fence = fence;
2215 }
2216
2217 c++;
2218 }
2219
2220 /*
2221 * Having this flag means user mode pends on event which will never
2222 * reach due to lack of at least one CRTC for signaling
2223 */
2224 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
2225 return -EINVAL;
2226
2227 return 0;
2228}
2229
2230static void complete_crtc_signaling(struct drm_device *dev,
2231 struct drm_atomic_state *state,
2232 struct drm_out_fence_state *fence_state,
2233 unsigned int num_fences,
2234 bool install_fds)
2235{
2236 struct drm_crtc *crtc;
2237 struct drm_crtc_state *crtc_state;
2238 int i;
2239
2240 if (install_fds) {
2241 for (i = 0; i < num_fences; i++)
2242 fd_install(fence_state[i].fd,
2243 fence_state[i].sync_file->file);
2244
2245 kfree(fence_state);
2246 return;
2247 }
2248
2249 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
2250 struct drm_pending_vblank_event *event = crtc_state->event;
2251 /*
2252 * Free the allocated event. drm_atomic_helper_setup_commit
2253 * can allocate an event too, so only free it if it's ours
2254 * to prevent a double free in drm_atomic_state_clear.
2255 */
2256 if (event && (event->base.fence || event->base.file_priv)) {
2257 drm_event_cancel_free(dev, &event->base);
2258 crtc_state->event = NULL;
2259 }
2260 }
2261
2262 if (!fence_state)
2263 return;
2264
2265 for (i = 0; i < num_fences; i++) {
2266 if (fence_state[i].sync_file)
2267 fput(fence_state[i].sync_file->file);
2268 if (fence_state[i].fd >= 0)
2269 put_unused_fd(fence_state[i].fd);
2270
2271 /* If this fails log error to the user */
2272 if (fence_state[i].out_fence_ptr &&
2273 put_user(-1, fence_state[i].out_fence_ptr))
2274 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n");
2275 }
2276
2277 kfree(fence_state);
2278}
2279
2280int drm_mode_atomic_ioctl(struct drm_device *dev,
2281 void *data, struct drm_file *file_priv)
2282{
2283 struct drm_mode_atomic *arg = data;
2284 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
2285 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
2286 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
2287 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
2288 unsigned int copied_objs, copied_props;
2289 struct drm_atomic_state *state;
2290 struct drm_modeset_acquire_ctx ctx;
2291 struct drm_plane *plane;
2292 struct drm_out_fence_state *fence_state;
2293 unsigned plane_mask;
2294 int ret = 0;
2295 unsigned int i, j, num_fences;
2296
2297 /* disallow for drivers not supporting atomic: */
2298 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
2299 return -EINVAL;
2300
2301 /* disallow for userspace that has not enabled atomic cap (even
2302 * though this may be a bit overkill, since legacy userspace
2303 * wouldn't know how to call this ioctl)
2304 */
2305 if (!file_priv->atomic)
2306 return -EINVAL;
2307
2308 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
2309 return -EINVAL;
2310
2311 if (arg->reserved)
2312 return -EINVAL;
2313
2314 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
2315 !dev->mode_config.async_page_flip)
2316 return -EINVAL;
2317
2318 /* can't test and expect an event at the same time. */
2319 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
2320 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
2321 return -EINVAL;
2322
2323 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
2324
2325 state = drm_atomic_state_alloc(dev);
2326 if (!state)
2327 return -ENOMEM;
2328
2329 state->acquire_ctx = &ctx;
2330 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
2331
2332retry:
2333 plane_mask = 0;
2334 copied_objs = 0;
2335 copied_props = 0;
2336 fence_state = NULL;
2337 num_fences = 0;
2338
2339 for (i = 0; i < arg->count_objs; i++) {
2340 uint32_t obj_id, count_props;
2341 struct drm_mode_object *obj;
2342
2343 if (get_user(obj_id, objs_ptr + copied_objs)) {
2344 ret = -EFAULT;
2345 goto out;
2346 }
2347
2348 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY);
2349 if (!obj) {
2350 ret = -ENOENT;
2351 goto out;
2352 }
2353
2354 if (!obj->properties) {
2355 drm_mode_object_put(obj);
2356 ret = -ENOENT;
2357 goto out;
2358 }
2359
2360 if (get_user(count_props, count_props_ptr + copied_objs)) {
2361 drm_mode_object_put(obj);
2362 ret = -EFAULT;
2363 goto out;
2364 }
2365
2366 copied_objs++;
2367
2368 for (j = 0; j < count_props; j++) {
2369 uint32_t prop_id;
2370 uint64_t prop_value;
2371 struct drm_property *prop;
2372
2373 if (get_user(prop_id, props_ptr + copied_props)) {
2374 drm_mode_object_put(obj);
2375 ret = -EFAULT;
2376 goto out;
2377 }
2378
2379 prop = drm_mode_obj_find_prop_id(obj, prop_id);
2380 if (!prop) {
2381 drm_mode_object_put(obj);
2382 ret = -ENOENT;
2383 goto out;
2384 }
2385
2386 if (copy_from_user(&prop_value,
2387 prop_values_ptr + copied_props,
2388 sizeof(prop_value))) {
2389 drm_mode_object_put(obj);
2390 ret = -EFAULT;
2391 goto out;
2392 }
2393
2394 ret = drm_atomic_set_property(state, obj, prop,
2395 prop_value);
2396 if (ret) {
2397 drm_mode_object_put(obj);
2398 goto out;
2399 }
2400
2401 copied_props++;
2402 }
2403
2404 if (obj->type == DRM_MODE_OBJECT_PLANE && count_props &&
2405 !(arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)) {
2406 plane = obj_to_plane(obj);
2407 plane_mask |= (1 << drm_plane_index(plane));
2408 plane->old_fb = plane->fb;
2409 }
2410 drm_mode_object_put(obj);
2411 }
2412
2413 ret = prepare_crtc_signaling(dev, state, arg, file_priv, &fence_state,
2414 &num_fences);
2415 if (ret)
2416 goto out;
2417
2418 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
2419 ret = drm_atomic_check_only(state);
2420 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
2421 ret = drm_atomic_nonblocking_commit(state);
2422 } else {
2423 if (unlikely(drm_debug & DRM_UT_STATE))
2424 drm_atomic_print_state(state);
2425
2426 ret = drm_atomic_commit(state);
2427 }
2428
2429out:
2430 drm_atomic_clean_old_fb(dev, plane_mask, ret);
2431
2432 complete_crtc_signaling(dev, state, fence_state, num_fences, !ret);
2433
2434 if (ret == -EDEADLK) {
2435 drm_atomic_state_clear(state);
2436 ret = drm_modeset_backoff(&ctx);
2437 if (!ret)
2438 goto retry;
2439 }
2440
2441 drm_atomic_state_put(state);
2442
2443 drm_modeset_drop_locks(&ctx);
2444 drm_modeset_acquire_fini(&ctx);
2445
2446 return ret;
2447}